Body Health Calculator⚖️ Weight & Body Composition
Assess body fat, BMI, and composition metrics to set realistic health goals.
BMI Calculator
Calculate your Body Mass Index (BMI) and find your healthy weight range. Works for adults and children.
Body Fat Calculator
Estimate body fat percentage using the US Navy circumference method. Find your goal weight at a healthy body fat level.
Visceral Fat
Estimate visceral fat area from waist and thigh measurements using a CT-validated model.
FFMI Calculator
Calculate your Fat-Free Mass Index normalized for height. Compare against drug-free athlete ranges.
Ideal Body Weight
Calculate ideal body weight using Devine, Robinson, Miller, and Hamwi formulas.
Muscle Mass
Estimate skeletal muscle mass percentage using the Janssen equation.
Waist-to-Height Ratio
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 the 0.5 boundary. Works in inches or centimeters for adults and children aged 5 and over.
Waist-to-Hip Ratio
Calculate waist-to-hip ratio with gender-specific health risk assessment.
ABSI Calculator
Calculate ABSI to assess abdominal obesity independent of BMI.
Adjusted Body Weight
Calculate adjusted body weight for drug dosing and nutrition when actual weight exceeds ideal body weight.
BAI Calculator
Estimate body fat percentage using hip circumference and height with the Body Adiposity Index.
Frame Size
Determine small, medium, or large body frame from wrist circumference and height.
BRI Calculator
Calculate Body Roundness Index from waist circumference and height to estimate visceral adiposity.
BSA Calculator
Calculate body surface area using Mosteller, Du Bois, and Haycock formulas.
Lean Body Mass
Estimate lean body mass using body fat percentage or the Boer equation.
Ponderal Index
Calculate ponderal index (weight/height³) as an alternative to BMI, especially for infants.
RFM Calculator
Estimate body fat percentage using only height and waist circumference.
Skinfold Body Fat
Estimate body fat percentage using the Jackson-Pollock 3-site skinfold method.
Weight Loss %
Calculate the percentage of body weight lost from starting to current weight.
Navy Body Fat
Calculate body fat percentage using the US Navy circumference method with neck, waist, and hip measurements.
BMI for Women
Calculate BMI with interpretation tailored for women, including healthy range and body composition context.
BMI for Teens
Calculate BMI for teenagers with age- and sex-specific percentile interpretation.
Geriatric BMI
Calculate BMI for adults 65+ with age-appropriate healthy weight ranges.
BMI Weight Loss
Calculate target weight for a goal BMI and how much weight you need to lose.