The Body Calculator
Calculators for the kind of numbers that turn up on a blood test, a fitness tracker, or your last GP visit. Type them in, see what each one means, and click through to the paper it came from. Nothing you enter ever leaves your browser.
Pick a category
Weight & Body Composition
BMI, BMR, TDEE, body fat %, waist-to-hip, ideal body weight, body surface area.
Open calculators →Diet & Nutrition
Daily protein, water, fibre, macro split, and a calorie plan to reach any goal weight.
Open calculators →Cardiovascular Health
MAP, pulse pressure, LDL, cholesterol ratio, 10-yr risk, CHA₂DS₂-VASc.
Open calculators →Metabolic Health
HOMA-IR, TyG, HbA1c, eGFR, Cockcroft-Gault, FIB-4 liver score.
Open calculators →Neurological & Mental
GAD-7 anxiety, Epworth sleepiness, STOP-BANG sleep apnea.
Open calculators →Fitness
Max heart rate, training zones, 1-rep max, VO₂max estimate.
Open calculators →