# Body Health Calculator > Free health and fitness calculators with cited medical sources: 135 calculators across 14 categories, plus comparisons and how-to guides. No signup. Every page has a markdown version at the same URL with `.md` appended (for example https://bodyhealthcalculator.com/bmi-calculator.md). Calculator pages list the formula, worked examples, FAQs, and numbered references. Content is for information only and is not medical advice. - [Full text of every page](https://bodyhealthcalculator.com/llms-full.txt) - [XML sitemap](https://bodyhealthcalculator.com/sitemap-index.xml) - [HTML sitemap](https://bodyhealthcalculator.com/sitemap) ## Weight & Body Composition Assess body fat, BMI, and composition metrics to set realistic health goals. Category page: https://bodyhealthcalculator.com/categories/body-composition.md - [BMI Calculator](https://bodyhealthcalculator.com/bmi-calculator.md): Calculate your Body Mass Index (BMI) and find your healthy weight range. Works for adults and children. - [Body Fat Calculator](https://bodyhealthcalculator.com/body-fat-calculator.md): Estimate body fat percentage using the US Navy circumference method. Find your goal weight at a healthy body fat level. - [Visceral Fat](https://bodyhealthcalculator.com/visceral-fat-calculator.md): Estimate visceral fat area from waist and thigh measurements using a CT-validated model. - [FFMI Calculator](https://bodyhealthcalculator.com/ffmi-calculator.md): Calculate your Fat-Free Mass Index normalized for height. Compare against drug-free athlete ranges. - [Ideal Body Weight](https://bodyhealthcalculator.com/ideal-body-weight-calculator.md): Calculate ideal body weight using Devine, Robinson, Miller, and Hamwi formulas. - [Muscle Mass](https://bodyhealthcalculator.com/muscle-mass-calculator.md): Estimate skeletal muscle mass percentage using the Janssen equation. - [Waist-to-Height Ratio](https://bodyhealthcalculator.com/waist-to-height-ratio-calculator.md): Calculate your waist-to-height ratio (WHtR) and see your NICE central adiposity category, the healthy waist range for your height, and how far you are from t... - [Waist-to-Hip Ratio](https://bodyhealthcalculator.com/waist-to-hip-ratio-calculator.md): Calculate waist-to-hip ratio with gender-specific health risk assessment. - [ABSI Calculator](https://bodyhealthcalculator.com/absi-calculator.md): Calculate ABSI to assess abdominal obesity independent of BMI. - [Adjusted Body Weight](https://bodyhealthcalculator.com/adjusted-body-weight-calculator.md): Calculate adjusted body weight for drug dosing and nutrition when actual weight exceeds ideal body weight. - [BAI Calculator](https://bodyhealthcalculator.com/bai-calculator.md): Estimate body fat percentage using hip circumference and height with the Body Adiposity Index. - [Frame Size](https://bodyhealthcalculator.com/body-frame-size-calculator.md): Determine small, medium, or large body frame from wrist circumference and height. - [BRI Calculator](https://bodyhealthcalculator.com/bri-calculator.md): Calculate Body Roundness Index from waist circumference and height to estimate visceral adiposity. - [BSA Calculator](https://bodyhealthcalculator.com/bsa-calculator.md): Calculate body surface area using Mosteller, Du Bois, and Haycock formulas. - [Lean Body Mass](https://bodyhealthcalculator.com/lean-body-mass-calculator.md): Estimate lean body mass using body fat percentage or the Boer equation. - [Ponderal Index](https://bodyhealthcalculator.com/ponderal-index-calculator.md): Calculate ponderal index (weight/height³) as an alternative to BMI, especially for infants. - [RFM Calculator](https://bodyhealthcalculator.com/rfm-calculator.md): Estimate body fat percentage using only height and waist circumference. - [Skinfold Body Fat](https://bodyhealthcalculator.com/skinfold-body-fat-calculator.md): Estimate body fat percentage using the Jackson-Pollock 3-site skinfold method. - [Weight Loss %](https://bodyhealthcalculator.com/weight-loss-percentage-calculator.md): Calculate the percentage of body weight lost from starting to current weight. - [Navy Body Fat](https://bodyhealthcalculator.com/navy-body-fat-calculator.md): Calculate body fat percentage using the US Navy circumference method with neck, waist, and hip measurements. - [BMI for Women](https://bodyhealthcalculator.com/bmi-calculator-for-women.md): Calculate BMI with interpretation tailored for women, including healthy range and body composition context. - [BMI for Teens](https://bodyhealthcalculator.com/bmi-calculator-for-teens.md): Calculate BMI for teenagers with age- and sex-specific percentile interpretation. - [Geriatric BMI](https://bodyhealthcalculator.com/geriatric-bmi-calculator.md): Calculate BMI for adults 65+ with age-appropriate healthy weight ranges. - [BMI Weight Loss](https://bodyhealthcalculator.com/bmi-weight-loss-calculator.md): Calculate target weight for a goal BMI and how much weight you need to lose. ## Calories & Metabolism Calculate TDEE, calorie deficits, and metabolic rate for weight management. Category page: https://bodyhealthcalculator.com/categories/calories-metabolism.md - [TDEE Calculator](https://bodyhealthcalculator.com/tdee-calculator.md): Calculate your Total Daily Energy Expenditure using the Mifflin-St Jeor equation and activity multipliers. - [Calorie Deficit](https://bodyhealthcalculator.com/calorie-deficit-calculator.md): Calculate a realistic calorie deficit and timeline to reach your weight loss goal. - [Calorie Goal](https://bodyhealthcalculator.com/calorie-goal-calculator.md): Calculate daily calories and macros to reach your weight loss or muscle gain goal. - [Max Fat Loss](https://bodyhealthcalculator.com/maximum-fat-loss-calculator.md): Find your maximum safe fat loss rate while preserving muscle mass. - [RMR Calculator](https://bodyhealthcalculator.com/rmr-calculator.md): Calculate resting metabolic rate with Mifflin-St Jeor, Harris-Benedict, and Katch-McArdle formulas. - [Reverse Diet](https://bodyhealthcalculator.com/reverse-diet-calculator.md): Create a reverse diet plan with weekly calorie increases after a cutting phase. - [BMR Calculator](https://bodyhealthcalculator.com/bmr-calculator.md): Calculate basal metabolic rate using the Mifflin-St Jeor equation. - [Harris-Benedict](https://bodyhealthcalculator.com/harris-benedict-calculator.md): Calculate BMR using the revised Harris-Benedict equation (1984). - [Katch-McArdle](https://bodyhealthcalculator.com/katch-mcardle-calculator.md): Calculate BMR using the Katch-McArdle formula based on lean body mass. - [Maintenance Calories](https://bodyhealthcalculator.com/maintenance-calorie-calculator.md): Calculate daily maintenance calories (TDEE) to stay at your current weight. - [Weight Gain](https://bodyhealthcalculator.com/weight-gain-calculator.md): Calculate daily calories and surplus needed for healthy weight gain. - [EER Calculator](https://bodyhealthcalculator.com/eer-calculator.md): Calculate Estimated Energy Requirement using IOM equations for adults. ## Calories Burned by Exercise Calories burned walking, running, cycling, swimming, lifting, yoga, and 20+ other workouts, by weight and intensity. Category page: https://bodyhealthcalculator.com/categories/exercise-calories.md - [Calories Burned](https://bodyhealthcalculator.com/calories-burned-calculator.md): Calories burned for 30 common exercises by body weight and time, from walking and running to weight lifting, yoga, and pickleball. Uses 2024 Adult Compendium... - [Swimming Calories](https://bodyhealthcalculator.com/swimming-calorie-calculator.md): Calories burned swimming by stroke, pace, and body weight. Freestyle, backstroke, breaststroke, butterfly, treading water, and open water, using 2024 Compend... - [Walking Calories](https://bodyhealthcalculator.com/walking-calorie-calculator.md): Calories burned walking by pace, distance, and body weight. Covers strolling, brisk walking, power walking, Nordic walking, sand, grass, and walking the dog,... - [Running Calories](https://bodyhealthcalculator.com/running-calorie-calculator.md): Calories burned running by pace (4 to 14 mph), distance, and body weight. Includes jogging, cross-country, hill running, and stroller running, with calories... - [Treadmill Calories](https://bodyhealthcalculator.com/treadmill-calorie-calculator.md): Calories burned on a treadmill from your exact speed, incline, and body weight, using the ACSM walking and running equations. Shows the extra burn from the i... - [Incline Walking Calories](https://bodyhealthcalculator.com/incline-walking-calorie-calculator.md): Calories burned walking on an incline treadmill, including the 12-3-30 workout. Enter speed, incline, and body weight to see total burn, the extra from the h... - [Hiking Calories](https://bodyhealthcalculator.com/hiking-calorie-calculator.md): Calories burned hiking by terrain, grade, and pack weight. Covers easy trails, steep climbs, day hikes with a pack, backpacking, and Nordic poles, using 2024... - [Rucking Calories](https://bodyhealthcalculator.com/rucking-calorie-calculator.md): Calories burned rucking from body weight, pack weight, speed, grade, and terrain, using the Pandolf load-carriage equation the military uses. Shows the extra... - [Cycling Calories](https://bodyhealthcalculator.com/cycling-calorie-calculator.md): Calories burned cycling by speed, body weight, and bike type. Covers leisure riding, road speeds from 10 to 20+ mph, commuting, mountain biking, and e-bikes,... - [Stationary Bike Calories](https://bodyhealthcalculator.com/stationary-bike-calorie-calculator.md): Calories burned on a stationary or spin bike by watts, effort level, and body weight. Covers upright and indoor bikes, spin classes, virtual rides, and bike... - [Air Bike Calories](https://bodyhealthcalculator.com/air-bike-calorie-calculator.md): Calories burned on an air bike (fan bike) by watts, effort, and body weight. Covers steady riding, sprint intervals, and arms-only work. - [Elliptical Calories](https://bodyhealthcalculator.com/elliptical-calorie-calculator.md): Calories burned on an elliptical trainer by effort and body weight, with a ski machine option and comparisons with the treadmill and bike. - [Stair Climber Calories](https://bodyhealthcalculator.com/stair-climber-calorie-calculator.md): Calories burned on a stair climber machine or real stairs by pace and body weight. Covers slow and fast climbing, two steps at a time, running stairs, and go... - [Rowing Machine Calories](https://bodyhealthcalculator.com/rowing-machine-calorie-calculator.md): Calories burned on a rowing machine by watts, effort, and body weight. Enter the average watts from your monitor for a power-based estimate. - [Jump Rope Calories](https://bodyhealthcalculator.com/jump-rope-calorie-calculator.md): Calories burned jumping rope by pace, body weight, and time. Covers slow, moderate, and fast skipping, double unders, and general rope work, with calories pe... - [Burpee Calories](https://bodyhealthcalculator.com/burpee-calorie-calculator.md): Calories burned doing burpees by body weight, time, and style. Covers steady burpee sets and burpee intervals, with calories per burpee and how burpees compa... - [Jumping Jacks Calories](https://bodyhealthcalculator.com/jumping-jacks-calorie-calculator.md): Calories burned doing jumping jacks by body weight, time, and effort. Covers warm-up pace, vigorous nonstop jacks, and interval workouts, with calories per j... - [Push-Up Calories](https://bodyhealthcalculator.com/push-up-calorie-calculator.md): Calories burned doing push-ups by reps, time, body weight, and push-up variation. Uses a rep-based model from measured oxygen use and shows how much of your... - [Squat Calories](https://bodyhealthcalculator.com/squat-calorie-calculator.md): Calories burned doing squats by reps, time, body weight, and squat type. Covers bodyweight squats with a rep-based model, plus squat circuits, weighted squat... - [Plank Calories](https://bodyhealthcalculator.com/plank-calorie-calculator.md): Calories burned holding a plank by hold time, sets, body weight, and plank type. Covers standard forearm and high planks and moving plank variations. - [Weight Lifting Calories](https://bodyhealthcalculator.com/weight-lifting-calorie-calculator.md): Calories burned lifting weights by body weight, session length, and training style. Covers general strength training, heavy squats and deadlifts, supersets,... - [HIIT Calories](https://bodyhealthcalculator.com/hiit-calorie-calculator.md): Calories burned in a HIIT workout by body weight, time, and intensity. Covers moderate intervals, bike sprints, and vigorous bodyweight circuits such as Taba... - [Circuit Training Calories](https://bodyhealthcalculator.com/circuit-training-calorie-calculator.md): Calories burned in circuit training by body weight, time, and effort. Covers light and moderate circuits, bodyweight circuits, supersets, and vigorous circui... - [Kettlebell Calories](https://bodyhealthcalculator.com/kettlebell-calorie-calculator.md): Calories burned with kettlebells by body weight, time, and workout type. Covers kettlebell swings, kettlebell circuits, and slower squats and deadlifts, with... - [Yoga Calories](https://bodyhealthcalculator.com/yoga-calorie-calculator.md): Calories burned doing yoga by body weight, class length, and style. Covers hatha, vinyasa, hot yoga, sun salutations, power yoga, and high-intensity hatha, w... - [Pilates Calories](https://bodyhealthcalculator.com/pilates-calorie-calculator.md): Calories burned doing Pilates by body weight, class length, and format. Covers mat Pilates, reformer classes, general studio sessions, and fast-paced classes... - [Stretching Calories](https://bodyhealthcalculator.com/stretching-calorie-calculator.md): Calories burned stretching by body weight, time, and type. Covers gentle static stretching, follow-along stretching videos, and active or dynamic mobility ro... - [Pickleball Calories](https://bodyhealthcalculator.com/pickleball-calorie-calculator.md): Calories burned playing pickleball by body weight, time on court, and format. Uses a measured value for recreational doubles and a paddle-sport estimate for... - [Tennis Calories](https://bodyhealthcalculator.com/tennis-calorie-calculator.md): Calories burned playing tennis by body weight, time on court, and format. Covers social doubles, hitting practice, standard doubles, general play, and single... - [Basketball Calories](https://bodyhealthcalculator.com/basketball-calorie-calculator.md): Calories burned playing basketball by body weight, time, and type of play. Covers shooting around, casual non-game play, pickup games, full games, and drills... ## Nutrition & Diet Plan macros, protein intake, hydration, and fasting windows. Category page: https://bodyhealthcalculator.com/categories/nutrition-diet.md - [Macro Calculator](https://bodyhealthcalculator.com/macro-calculator.md): Calculate daily macros in grams for 11 diet types including keto, paleo, and high protein. - [Protein Calculator](https://bodyhealthcalculator.com/protein-calculator.md): Calculate daily protein needs based on weight, activity level, and goals. - [IF Calculator](https://bodyhealthcalculator.com/intermittent-fasting-calculator.md): Calculate eating and fasting windows for 16:8, 18:6, 20:4, and OMAD protocols. - [Hydration](https://bodyhealthcalculator.com/hydration-calculator.md): Calculate personalized daily water intake based on weight, exercise, and climate. - [Carb Calculator](https://bodyhealthcalculator.com/carb-calculator.md): Calculate daily carbohydrate grams from calorie target and carb percentage. - [Fat Intake](https://bodyhealthcalculator.com/fat-intake-calculator.md): Calculate daily fat grams from calories and fat percentage. - [Fiber Calculator](https://bodyhealthcalculator.com/fiber-calculator.md): Calculate recommended daily fiber intake based on calories, age, and sex. - [Net Carbs](https://bodyhealthcalculator.com/net-carbs-calculator.md): Calculate net carbohydrates by subtracting fiber and sugar alcohols from total carbs. - [Keto Calculator](https://bodyhealthcalculator.com/keto-calculator.md): Calculate keto macros with high fat, moderate protein, and very low net carbs. - [IIFYM Calculator](https://bodyhealthcalculator.com/iifym-calculator.md): Calculate flexible dieting macros based on calories, body weight, and protein factor. - [Added Sugar](https://bodyhealthcalculator.com/added-sugar-calculator.md): Calculate maximum recommended daily added sugar intake. - [Sodium in Salt](https://bodyhealthcalculator.com/sodium-in-salt-calculator.md): Convert between sodium milligrams and salt grams. - [Vitamin D](https://bodyhealthcalculator.com/vitamin-d-calculator.md): Estimate recommended daily vitamin D intake based on age and deficiency status. ## Fitness & Training Optimize workouts with 1RM, heart rate zones, and VO₂ max estimates. Category page: https://bodyhealthcalculator.com/categories/fitness-training.md - [Body Recomp](https://bodyhealthcalculator.com/body-recomposition-calculator.md): Calculate calorie and protein targets for simultaneous fat loss and muscle gain. - [1RM Calculator](https://bodyhealthcalculator.com/one-rep-max-calculator.md): Calculate your one-rep max using Epley, Brzycki, and Lombardi formulas. - [Heart Rate Zones](https://bodyhealthcalculator.com/heart-rate-zone-calculator.md): Calculate training zones using the Karvonen method with Tanaka, Fox, or Gulati max HR formulas. - [VO2 Max](https://bodyhealthcalculator.com/vo2-max-calculator.md): Estimate VO2 max using resting heart rate, Cooper 12-minute run, or Rockport walk test. ## Supplements & Lifestyle Fine-tune caffeine, creatine, alcohol intake, and longevity habits. Category page: https://bodyhealthcalculator.com/categories/supplements-lifestyle.md - [Caffeine](https://bodyhealthcalculator.com/caffeine-calculator.md): Track caffeine dose, peak timing, and sleep impact based on weight and consumption time. - [Alcohol Calories](https://bodyhealthcalculator.com/alcohol-calorie-calculator.md): Calculate calories in beer, wine, and spirits. See impact on your calorie deficit. - [Creatine](https://bodyhealthcalculator.com/creatine-calculator.md): Calculate optimal creatine dosage for loading and maintenance phases using ISSN guidelines. - [Longevity Score](https://bodyhealthcalculator.com/longevity-score-calculator.md): Assess daily habits across nutrition, exercise, sleep, and stress for a longevity score. ## Tools & Utilities Measurement conversions and nutrition knowledge quizzes. Category page: https://bodyhealthcalculator.com/categories/tools-utilities.md - [Nutrition Quiz](https://bodyhealthcalculator.com/health-nutrition-quiz.md): Test your knowledge of nutrition, metabolism, and fitness with 5 science-backed questions. - [Conversions](https://bodyhealthcalculator.com/measurement-conversions.md): Convert between US and metric measurements for weight, height, temperature, and volume. ## Diabetes & Blood Sugar Convert glucose units, estimate A1c, and assess insulin resistance and diabetes risk. Category page: https://bodyhealthcalculator.com/categories/diabetes.md - [Blood Sugar Converter](https://bodyhealthcalculator.com/blood-sugar-converter.md): Convert blood glucose between mg/dL and mmol/L units. - [A1c Calculator](https://bodyhealthcalculator.com/a1c-calculator.md): Estimate HbA1c from average blood glucose using the ADAG formula. - [eAG Calculator](https://bodyhealthcalculator.com/estimated-average-glucose-calculator.md): Convert HbA1c to estimated average glucose in mg/dL and mmol/L. - [HOMA-IR](https://bodyhealthcalculator.com/homa-ir-calculator.md): Calculate Homeostatic Model Assessment for Insulin Resistance from fasting glucose and insulin. - [QUICKI Index](https://bodyhealthcalculator.com/quicki-calculator.md): Calculate Quantitative Insulin Sensitivity Check Index from fasting glucose and insulin. - [Glycemic Load](https://bodyhealthcalculator.com/glycemic-load-calculator.md): Calculate glycemic load from glycemic index and carbohydrates per serving. - [Glycemic Index](https://bodyhealthcalculator.com/glycemic-index-calculator.md): Look up glycemic index values for common foods and classify as low, medium, or high GI. - [Diabetes Risk](https://bodyhealthcalculator.com/diabetes-risk-calculator.md): Screen for type 2 diabetes risk using age, BMI, waist, activity, and family history. - [Insulin Dosage](https://bodyhealthcalculator.com/insulin-dosage-calculator.md): Estimate meal bolus insulin from carbs, current glucose, and personal ratios. ## Sleep & Recovery Plan sleep cycles, track sleep debt, and screen for sleep apnea and daytime sleepiness. Category page: https://bodyhealthcalculator.com/categories/sleep.md - [Sleep Calculator](https://bodyhealthcalculator.com/sleep-calculator.md): Calculate optimal wake times based on 90-minute sleep cycles. - [Sleep Debt](https://bodyhealthcalculator.com/sleep-debt-calculator.md): Calculate accumulated sleep debt from insufficient nightly sleep over time. - [Epworth Scale](https://bodyhealthcalculator.com/epworth-sleepiness-calculator.md): Score daytime sleepiness using the validated Epworth Sleepiness Scale (ESS). - [STOP-BANG](https://bodyhealthcalculator.com/stop-bang-calculator.md): Screen for obstructive sleep apnea risk using the STOP-BANG questionnaire. - [AHI Calculator](https://bodyhealthcalculator.com/ahi-calculator.md): Calculate apnea-hypopnea index from apnea events and hours of sleep. ## Heart & Cardiovascular Assess blood pressure, cholesterol, and cardiovascular disease risk. Category page: https://bodyhealthcalculator.com/categories/cardiovascular.md - [Blood Pressure](https://bodyhealthcalculator.com/blood-pressure-calculator.md): Classify blood pressure readings using ACC/AHA 2017 guidelines. - [MAP Calculator](https://bodyhealthcalculator.com/map-calculator.md): Calculate mean arterial pressure from systolic and diastolic blood pressure. - [ABI Calculator](https://bodyhealthcalculator.com/abi-calculator.md): Calculate ankle-brachial index to screen for peripheral artery disease. - [Framingham Risk](https://bodyhealthcalculator.com/framingham-risk-calculator.md): Estimate 10-year cardiovascular disease risk using Framingham-based factors. - [CVD Risk](https://bodyhealthcalculator.com/cvd-risk-calculator.md): Assess overall cardiovascular disease risk from major modifiable factors. - [Cholesterol Ratio](https://bodyhealthcalculator.com/cholesterol-ratio-calculator.md): Calculate total cholesterol to HDL ratio for heart disease risk assessment. - [LDL Calculator](https://bodyhealthcalculator.com/ldl-calculator.md): Calculate LDL cholesterol using the Friedewald equation. - [VLDL Calculator](https://bodyhealthcalculator.com/vldl-calculator.md): Estimate VLDL cholesterol from triglyceride levels. - [Cholesterol Converter](https://bodyhealthcalculator.com/cholesterol-units-converter.md): Convert cholesterol values between mg/dL and mmol/L. ## Metabolic Disorders Screen for metabolic syndrome and related cardiometabolic risk factors. Category page: https://bodyhealthcalculator.com/categories/metabolic-disorders.md - [Metabolic Syndrome](https://bodyhealthcalculator.com/metabolic-syndrome-calculator.md): Screen for metabolic syndrome using ATP III / IDF harmonized criteria. ## Addiction & Recovery Estimate alcohol intake, nicotine dependence, and track sobriety milestones. Category page: https://bodyhealthcalculator.com/categories/addiction.md - [BAC Calculator](https://bodyhealthcalculator.com/bac-calculator.md): Estimate blood alcohol content using the Widmark formula. - [Standard Drink](https://bodyhealthcalculator.com/standard-drink-calculator.md): Calculate US standard drinks from beverage volume and ABV. - [Alcohol Units](https://bodyhealthcalculator.com/alcohol-unit-calculator.md): Calculate UK alcohol units from drink volume and ABV. - [Pack-Years](https://bodyhealthcalculator.com/pack-year-calculator.md): Calculate smoking pack-years for lung cancer and COPD risk assessment. - [Fagerström Test](https://bodyhealthcalculator.com/fagerstrom-calculator.md): Score nicotine dependence using the Fagerström test. - [HSI Calculator](https://bodyhealthcalculator.com/hsi-calculator.md): Calculate the Heaviness of Smoking Index from cigarettes per day and time to first cigarette. - [Smoking Recovery](https://bodyhealthcalculator.com/smoking-recovery-calculator.md): See health recovery milestones after quitting smoking based on time since quit. - [Sobriety Calculator](https://bodyhealthcalculator.com/sobriety-calculator.md): Track days, weeks, and months of sobriety from your quit date. - [CAGE Questionnaire](https://bodyhealthcalculator.com/cage-questionnaire-calculator.md): Screen for alcohol use disorder with the 4-question CAGE questionnaire. ## Pregnancy & Reproductive Health Calculate due dates, ovulation windows, gestational age, and pregnancy nutrition needs. Category page: https://bodyhealthcalculator.com/categories/pregnancy.md - [Due Date](https://bodyhealthcalculator.com/due-date-calculator.md): Calculate estimated due date from last menstrual period using Naegele's rule. - [Ovulation Calculator](https://bodyhealthcalculator.com/ovulation-calculator.md): Estimate ovulation date and fertile window from last period and cycle length. - [Conception Date](https://bodyhealthcalculator.com/conception-calculator.md): Estimate conception date from LMP or IVF embryo transfer date. - [Gestational Age](https://bodyhealthcalculator.com/gestational-age-calculator.md): Calculate current gestational age in weeks and days from LMP. - [Pregnancy Weight Gain](https://bodyhealthcalculator.com/pregnancy-weight-gain-calculator.md): Calculate recommended total pregnancy weight gain based on pre-pregnancy BMI. - [Period Calculator](https://bodyhealthcalculator.com/period-calculator.md): Predict next period and ovulation based on cycle length and last period date. - [Breastfeeding Calories](https://bodyhealthcalculator.com/breastfeeding-calorie-calculator.md): Calculate daily calorie needs while breastfeeding based on TDEE plus lactation. ## Kidney & Filtration Estimate GFR, creatinine clearance, albuminuria, and related kidney lab ratios. Category page: https://bodyhealthcalculator.com/categories/kidney.md - [GFR](https://bodyhealthcalculator.com/gfr-calculator.md): Estimate adult glomerular filtration rate with the 2021 CKD-EPI creatinine equation and KDIGO GFR categories. - [CKD-EPI 2021](https://bodyhealthcalculator.com/ckd-epi-calculator.md): Compare 2021 CKD-EPI creatinine eGFR with the optional creatinine-cystatin C combined equation. - [Cockcroft-Gault](https://bodyhealthcalculator.com/cockcroft-gault-calculator.md): Estimate creatinine clearance from age, sex, weight, and serum creatinine using the 1976 Cockcroft-Gault equation. - [Creatinine Clearance](https://bodyhealthcalculator.com/creatinine-clearance-calculator.md): Calculate measured creatinine clearance from a timed urine collection, urine creatinine, and plasma creatinine. - [ACR](https://bodyhealthcalculator.com/albumin-creatinine-ratio-calculator.md): Convert a spot urine albumin and creatinine into an albumin-creatinine ratio and KDIGO A1 to A3 category. - [BUN/Creatinine](https://bodyhealthcalculator.com/bun-creatinine-ratio-calculator.md): Calculate the blood urea nitrogen to creatinine ratio and review common teaching patterns without treating the ratio as a diagnosis. ## Guides - [How to Calculate TDEE for Weight Loss (Step by Step)](https://bodyhealthcalculator.com/guides/how-to-calculate-tdee-for-weight-loss.md): Calculate TDEE by estimating BMR with Mifflin-St Jeor, multiplying by an activity factor, then subtract 250 to 500 kcal per day for a typical fat loss rate o... - [How to Convert Blood Sugar from mmol/L to mg/dL](https://bodyhealthcalculator.com/guides/how-to-convert-blood-sugar-mmol-to-mgdl.md): Multiply mmol/L by 18.0182 to get mg/dL. Example: 5.6 mmol/L × 18.0182 ≈ 101 mg/dL. Lab reports may round differently; use the same factor consistently when... - [How to Calculate Body Fat Percentage at Home](https://bodyhealthcalculator.com/guides/how-to-calculate-body-fat-percentage-at-home.md): At home, measure neck, waist, and hip (women) with a flexible tape, plug values into a Navy body fat equation, or use calipers at three to seven sites with a... - [How to Read A1C Results: Percent, eAG, and Next Steps](https://bodyhealthcalculator.com/guides/how-to-read-a1c-results.md): A1c reflects average glucose over roughly three months. ADA uses 5.7% to 6.4% for prediabetes and 6.5% or higher for diabetes when confirmed on a second test... - [Blood Sugar Conversion Chart: mmol/L to mg/dL](https://bodyhealthcalculator.com/guides/blood-sugar-mmol-to-mgdl.md): Standard conversion: mg/dL = mmol/L × 18.0182. Fasting 5.6 mmol/L equals about 101 mg/dL. Keep a small chart for travel, research papers, and CGM exports tha... - [Blood Sugar Conversion Chart: mg/dL to mmol/L](https://bodyhealthcalculator.com/guides/blood-sugar-mgdl-to-mmol.md): Divide mg/dL by 18.0182 to get mmol/L. Example: 126 mg/dL ÷ 18.0182 ≈ 7.0 mmol/L. Use the same factor both directions to avoid rounding drift when you log mi... - [BMI Calculator for Athletes: When BMI Misclassifies Muscle](https://bodyhealthcalculator.com/guides/bmi-calculator-for-athletes.md): Athletes with high lean mass frequently score BMI 25 or above without excess fat. Pair BMI with waist circumference, body fat estimation, or sport-specific p... - [BMI Calculator for Seniors: Older Adult Context](https://bodyhealthcalculator.com/guides/bmi-calculator-for-seniors.md): In adults 65 and older, some guidelines allow slightly higher BMI before weight loss is advised because low BMI can signal muscle loss and frailty. Discuss t... - [Protein Calculator for Weight Loss: Grams per Day](https://bodyhealthcalculator.com/guides/protein-calculator-for-weight-loss.md): During weight loss, many adults aim for 1.6 to 2.2 g protein per kg body weight (roughly 0.7 to 1.0 g per lb) spread across meals. Higher protein can improve... - [How to Calculate a Calorie Deficit Safely](https://bodyhealthcalculator.com/guides/how-to-calculate-calorie-deficit.md): Subtract 500 kcal per day from maintenance for about 1 lb per week loss, or 250 kcal for a slower cut. Most adults should not go below roughly 1,200 kcal (wo... - [How to Interpret Blood Pressure Readings at Home](https://bodyhealthcalculator.com/guides/how-to-interpret-blood-pressure-readings.md): Classify the higher of systolic or diastolic using ACC/AHA 2017 tables. Take two readings one minute apart, twice daily for three to seven days, and average... - [How to Calculate Due Date from Last Menstrual Period](https://bodyhealthcalculator.com/guides/how-to-calculate-due-date-from-lmp.md): For regular 28-day cycles, add 280 days (40 weeks) to the first day of the last menstrual period. Irregular cycles or uncertainty about LMP date warrant firs... - [Which Exercise Burns the Most Calories? 30 Activities Ranked](https://bodyhealthcalculator.com/guides/which-exercise-burns-the-most-calories.md): Running burns the most calories for most people: about 654 an hour at 6 mph for a 155 lb person. A stair climber burns the same, and a spin class about 633.... ## Best free tools - [Best Free BMI Calculators in 2026: What to Look For](https://bodyhealthcalculator.com/best/free-bmi-calculator-2026.md): The best free BMI calculators in 2026 show CDC adult categories or pediatric percentiles, explain that BMI screens rather than diagnoses body fat, and work w... - [Best Free TDEE Calculators in 2026: Maintenance Calories Done Right](https://bodyhealthcalculator.com/best/free-tdee-calculator-2026.md): Strong free TDEE calculators in 2026 use Mifflin-St Jeor or Harris-Benedict with labeled activity multipliers, show BMR and TDEE separately, and remind you t... - [Best Free Blood Sugar Converters in 2026: mg/dL and mmol/L](https://bodyhealthcalculator.com/best/free-blood-sugar-converter-2026.md): Top free blood sugar converters in 2026 multiply mmol/L by 18.0182 to get mg/dL (or divide the other direction), display both units side by side, and link AD... - [Best Free Body Fat Calculators in 2026: Tape, Calipers, and BIA](https://bodyhealthcalculator.com/best/free-body-fat-calculator-2026.md): The best free body fat calculators in 2026 name the underlying method (for example Navy circumference equations), give sex-specific ranges, and warn that hom... - [Best Free Macro Calculators in 2026: AMDR-Aligned Splits](https://bodyhealthcalculator.com/best/free-macro-calculator-2026.md): Quality free macro calculators in 2026 start from your calorie target, set protein in grams per kilogram (often 1.2 to 2.0 g/kg depending on activity), then... - [Best Free Blood Pressure Calculators in 2026: ACC/AHA Categories](https://bodyhealthcalculator.com/best/free-blood-pressure-calculator-2026.md): The best free blood pressure calculators in 2026 map systolic and diastolic pairs to ACC/AHA categories (normal below 120/80, elevated, stage 1, stage 2), no... - [Best Free A1C Calculators in 2026: eAG and Diagnostic Cutoffs](https://bodyhealthcalculator.com/best/free-a1c-calculator-2026.md): Reliable free A1c calculators in 2026 use the ADAG linear equation for estimated average glucose, show ADA cutoffs (5.7% prediabetes, 6.5% diabetes when conf... - [Best Free Pregnancy Due Date Calculators in 2026](https://bodyhealthcalculator.com/best/free-pregnancy-due-date-calculator-2026.md): The best free due date calculators in 2026 apply Naegele rule for regular cycles, let you enter ultrasound dates when LMP is uncertain, and explain that only... ## Alternatives - [BMI Calculator Alternatives: Options Compared (2026)](https://bodyhealthcalculator.com/alternatives/bmi-calculator.md): Free BMI screening comes from government health widgets, multi-calculator websites, fitness apps, and clinician office visits. Pick based on whether you need... - [TDEE Calculator Alternatives: Maintenance Calorie Tools](https://bodyhealthcalculator.com/alternatives/tdee-calculator.md): Total daily energy expenditure tools differ by BMR equation (Mifflin-St Jeor vs Harris-Benedict), activity multipliers, and whether they link to food logging... - [Blood Sugar Converter Alternatives: mmol/L and mg/dL Tools](https://bodyhealthcalculator.com/alternatives/blood-sugar-converter.md): Glucose converters should use the standard factor (mg/dL = mmol/L × 18.0182), show both units clearly, and explain fasting vs random context. Hospital lab po... - [Body Fat Calculator Alternatives: Home Measurement Methods](https://bodyhealthcalculator.com/alternatives/body-fat-calculator.md): Body fat estimates come from circumference formulas, caliper skinfolds, bioimpedance scales, or clinical DXA. Tape-based Navy methods need no special hardwar... - [Macro Calculator Alternatives: Protein, Carbs, and Fat Split Tools](https://bodyhealthcalculator.com/alternatives/macro-calculator.md): Macro tools range from simple percentage splitters to TDEE-linked planners with protein grams per kilogram. Look for Dietary Guidelines AMDR ranges (10 to 35... - [Blood Pressure Calculator Alternatives: Category and MAP Tools](https://bodyhealthcalculator.com/alternatives/blood-pressure-calculator.md): Blood pressure tools classify systolic/diastolic pairs into ACC/AHA stages, compute MAP for clinical contexts, or sync with Bluetooth cuffs. A single reading... - [A1C Calculator Alternatives: Average Glucose and Lab Decoders](https://bodyhealthcalculator.com/alternatives/a1c-calculator.md): A1c tools translate hemoglobin A1c percent to estimated average glucose using the ADAG equation, or explain ADA diagnostic cutoffs (5.7% prediabetes, 6.5% di... - [Due Date Calculator Alternatives: LMP and Ultrasound Dating](https://bodyhealthcalculator.com/alternatives/due-date-calculator.md): Due date estimators apply Naegele rule (LMP + 280 days) or adjust from ultrasound crown-rump length in the first trimester. First-trimester ultrasound dating... ## Comparisons - [BMI vs Body Fat Calculator: Which Should You Use?](https://bodyhealthcalculator.com/compare/bmi-vs-body-fat-calculator.md): Use BMI for quick population screening based on weight and height. Use a body fat calculator when muscle mass, fat distribution, or athletic build makes BMI... - [TDEE vs BMR Calculator: Maintenance Calories Explained](https://bodyhealthcalculator.com/compare/tdee-vs-bmr-calculator.md): BMR estimates calories burned at complete rest. TDEE adds daily activity and equals maintenance calories. Use BMR as a baseline; use TDEE to set eating targets. - [A1C vs Fasting Glucose: Which Test Tells You More?](https://bodyhealthcalculator.com/compare/a1c-vs-fasting-glucose.md): Fasting glucose shows your blood sugar at one moment after an overnight fast. A1c reflects average glucose over two to three months. Clinicians often use bot... - [Mifflin-St Jeor vs Harris-Benedict: Which BMR Formula Is Better?](https://bodyhealthcalculator.com/compare/mifflin-st-jeor-vs-harris-benedict.md): Mifflin-St Jeor is more accurate for modern adults and is the default in most clinical and fitness settings. Harris-Benedict remains useful for comparison bu... - [Waist-to-Height Ratio vs BMI: Which Screening Tool Is Better?](https://bodyhealthcalculator.com/compare/waist-to-height-ratio-vs-bmi.md): BMI screens total weight relative to height. Waist-to-height ratio screens central fat storage. WHtR below 0.5 is linked to lower cardiovascular risk even wh... - [Navy Body Fat vs Skinfold Method: Home Measurement Compared](https://bodyhealthcalculator.com/compare/navy-body-fat-vs-skinfold.md): The Navy method uses neck, waist, and hip circumferences with a tape measure. Skinfold calipers measure subcutaneous fat at three skin sites. Both estimate b... - [Blood Sugar mmol/L vs mg/dL: Units Compared](https://bodyhealthcalculator.com/compare/blood-sugar-mmol-vs-mgdl.md): The United States reports blood glucose in mg/dL. Most other countries use mmol/L. Multiply mmol/L by 18.0182 to get mg/dL, or divide mg/dL by 18.0182 for mm... - [MAP vs Blood Pressure: What Each Reading Means](https://bodyhealthcalculator.com/compare/map-vs-blood-pressure.md): Standard blood pressure reports systolic and diastolic values in mmHg. Mean arterial pressure (MAP) is a single number representing average pressure in the a... - [HOMA-IR vs A1C: Insulin Resistance vs Long-Term Glucose](https://bodyhealthcalculator.com/compare/homa-ir-vs-a1c.md): HOMA-IR estimates insulin resistance from fasting glucose and insulin. A1c reflects average blood sugar over two to three months. HOMA-IR can rise before A1c... - [Devine vs Robinson Ideal Weight: Formula Comparison](https://bodyhealthcalculator.com/compare/devine-vs-robinson-ideal-weight.md): Devine (1974) and Robinson (1983) both estimate ideal body weight from height and sex using inches above five feet. Robinson typically yields slightly lower... ## Optional - [About](https://bodyhealthcalculator.com/about.md): Mission and calculator categories - [Editorial policies](https://bodyhealthcalculator.com/editorial-policies.md): How we source, review, and update content - [For AI agents](https://bodyhealthcalculator.com/agents): Citation guide and markdown URL pattern - [Medical disclaimer](https://bodyhealthcalculator.com/disclaimer) - [Privacy policy](https://bodyhealthcalculator.com/privacy) - [Terms of use](https://bodyhealthcalculator.com/terms) - [Contact](https://bodyhealthcalculator.com/contact)