Fitness & Health Calculators

BMI, calorie, body fat and other calculators for fitness and everyday health.

BMI Calculator
Work out your body mass index from height and weight, see your weight category and the weight range considered healthy for your height.
BMR Calculator
Calculate your basal metabolic rate, the calories your body burns at rest, with the Mifflin-St Jeor, Harris-Benedict or Katch-McArdle equation.
Body Fat Calculator
Estimate your body fat percentage with the U.S. Navy tape-measure method, plus your fat mass and lean mass.
Calorie Calculator
Estimate how many calories you need each day to maintain, lose or gain weight, based on your body and activity level.
Due Date Calculator
Estimate your baby’s due date from your last period, conception date or IVF transfer date and see the full week-by-week calendar.
Ideal Weight Calculator
Compare the Robinson, Miller, Devine and Hamwi formulas to see an ideal weight range for your height and sex.
Macro Calculator
Turn your daily calories into grams of protein, carbohydrates and fat with presets for balanced, low-carb, high-protein and keto diets.
Ovulation Calculator
Estimate your ovulation day and fertile window from your cycle length, and see the next six cycles at a glance.
Pace Calculator
Find your running or walking pace, finish time or distance, with kilometer and mile splits and predicted race times.
Pregnancy Calculator
Find your due date, how far along you are, your trimester and a week-by-week calendar from your last period, due date or conception date.
TDEE Calculator
Calculate your total daily energy expenditure, the calories you burn in a day including activity, and get calorie targets for weight loss or gain.