INDEX · BMI
BMI calculator
Calculate body mass index using metric or imperial inputs.
№ 3Category index
Health calculators
Browse the live health calculators for body-composition tape tests, ABSI and body metrics, calorie planning, pregnancy timing, pace math, MET-based calorie burn, sweat-rate hydration, and heart-rate estimates.
Live set
Live Health calculators
28 live calculators currently grouped in this category.
HEALTH · BMR
BMR calculator
Estimate basal metabolic rate from weight, height, age, and sex.
HEALTH · TDEE
TDEE calculator
Estimate maintenance calories from BMR and activity level.
HEALTH · BODY FAT
Body fat calculator
Estimate body fat percentage from circumference measurements.
HEALTH · MACROS
Macro calculator
Convert a calorie target into grams of protein, carbs, and fat.
HEALTH · HYDRATION
Water intake calculator
Estimate a daily water target in ounces and liters.
HEALTH · CALORIES
Calorie calculator
Estimate daily calories for maintenance, weight loss, or weight gain.
HEALTH · HEART RATE
Target heart rate calculator
Estimate training-zone heart rates from age and optional resting heart rate.
HEALTH · BSA
Body surface area calculator
Estimate body surface area from height and weight with the Du Bois formula.
HEALTH · HEALTHY WEIGHT
Healthy weight calculator
Turn height into a healthy-weight range using the standard adult BMI band.
HEALTH · IDEAL WEIGHT
Ideal weight calculator
Estimate ideal body weight with the Devine formula.
HEALTH · LEAN MASS
Lean body mass calculator
Estimate lean body mass with the Boer formula.
HEALTH · WHR
Waist to hip ratio calculator
Calculate waist-to-hip ratio and compare it with standard threshold bands.
HEALTH · PROTEIN
Protein calculator
Estimate a daily protein target from body weight and activity level.
HEALTH · DUE DATE
Due date calculator
Estimate a due date from LMP or conception date and check the current gestational week.
HEALTH · OVULATION
Ovulation calculator
Estimate ovulation date and fertile window from an LMP date and cycle length.
HEALTH · PREGNANCY
Pregnancy calculator
Estimate weeks pregnant and trimester from LMP or conception date.
HEALTH · 1RM
One rep max calculator
Estimate one-rep max with Epley and compare it with a Brzycki cross-check.
HEALTH · ARMY BODY FAT
Army body fat calculator
Estimate body fat percentage with the Army AR 600-9 tape-measure method.
HEALTH · NAVY BODY FAT
Navy body fat calculator
Estimate body fat percentage with the Navy circumference-density method.
HEALTH · ABSI
Body shape index calculator
Calculate ABSI from waist circumference, weight, and height.
HEALTH · RUN PACE
Running pace calculator
Solve running pace, finish time, or distance in miles or kilometers.
HEALTH · SWIM PACE
Swim pace calculator
Calculate swim pace per 100 meters and per 100 yards.
HEALTH · MAX HR
Maximum heart rate calculator
Compare Tanaka, Fox, and Gulati max-heart-rate estimates.
HEALTH · WALK CALORIES
Calories burned walking calculator
Estimate calories burned walking from pace, duration, and body weight.
HEALTH · RUN CALORIES
Calories burned running calculator
Estimate calories burned running from pace, duration, and body weight.
HEALTH · BIKE CALORIES
Calories burned cycling calculator
Estimate calories burned cycling from intensity, duration, and body weight.
HEALTH · SWEAT RATE
Sweat rate calculator
Estimate sweat rate in liters per hour from workout weight change and fluid intake.