Neutral guides to screening tools, agency references, home methods, and clinical workflows. No competitor rankings: we compare approaches so you can pick what fits.
Free BMI screening comes from government health widgets, multi-calculator websites, fitness apps, and clinician office visits. Pick based on whether you need pediatric percentiles, cited articles, or a single quick number.
Total daily energy expenditure tools differ by BMR equation (Mifflin-St Jeor vs Harris-Benedict), activity multipliers, and whether they link to food logging. The best choice shows its math and lets you validate with real-world tracking.
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 portals already convert units; standalone tools help when you travel or read international research.
Body fat estimates come from circumference formulas, caliper skinfolds, bioimpedance scales, or clinical DXA. Tape-based Navy methods need no special hardware; calipers and BIA add cost but can track trends if you keep technique consistent.
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% protein, 45 to 65% carbs, 20 to 35% fat for adults) and adjustable calories tied to your maintenance estimate.
Blood pressure tools classify systolic/diastolic pairs into ACC/AHA stages, compute MAP for clinical contexts, or sync with Bluetooth cuffs. A single reading is not a diagnosis; repeated home averages predict risk better than one clinic value.
A1c tools translate hemoglobin A1c percent to estimated average glucose using the ADAG equation, or explain ADA diagnostic cutoffs (5.7% prediabetes, 6.5% diabetes when confirmed). Lab reports from NGSP-certified methods remain the standard for clinical decisions.
Due date estimators apply Naegele rule (LMP + 280 days) or adjust from ultrasound crown-rump length in the first trimester. First-trimester ultrasound dating is more accurate than LMP alone when cycles are irregular.
Body Health Calculator