Health Calculators

Body and nutrition tools like BMI and daily calorie needs, in metric or imperial units.

BMI Calculator

Find your body mass index in metric or imperial units and see your weight category.

Estimate your daily calorie needs (TDEE) plus weight-loss and gain targets using Mifflin-St Jeor.

Find your band and cup size from your underbust and bust measurements, plus sister sizes to try.

Estimate your 1RM from a set using six proven formulas, with a percentage-of-1RM training-load chart.

Get daily protein, carb, and fat targets from your stats, activity, goal, and chosen macro split.

Estimate body fat percentage with the U.S. Navy tape method, plus your fat and lean mass.

Estimate daily water needs from your weight, exercise, and climate — in ounces, liters, and cups.

Estimate body surface area (BSA) from height and weight using the Mosteller, Du Bois, and Haycock formulas.

Find your basal metabolic rate (resting calories) with the Mifflin-St Jeor and Harris-Benedict equations.

Estimate a healthy weight for your height and gender using the Devine, Robinson, Miller, and Hamwi formulas.

Estimate your due date, conception date, current week, and trimester from your last period.

Find your waist-to-hip ratio, body shape, and WHO health-risk category from two measurements.