Health Calculators

Understand your body with clear, science-based health calculators for weight, calories, macros and fitness.

Check your Body Mass Index and healthy weight range.

Estimate the calories your body burns at complete rest.

Find your daily calories to lose, maintain or gain weight.

Estimate body fat percentage with the US Navy tape method.

Compare Devine, Robinson, Miller and Hamwi ideal weights.

Split your daily calories into protein, carbs and fat.

Estimate your due date, gestational age and trimesters.

Estimate your fertile window and ovulation day.

Work out how much water to drink each day.

Find your max heart rate and five training zones in bpm.

Solve for pace, time or distance and predict race times.