Health & Fitness

General fitness and body-measurement estimates; not for medical diagnosis or treatment.

Calculate body mass index from height and weight.

Estimate basal metabolic rate using the Mifflin–St Jeor equation.

Calculate pace per kilometer and average speed from distance and time.

Estimate one-rep max from weight and repetitions.

Estimate a target heart-rate zone using the Karvonen method.

Estimate daily energy needs using the Mifflin–St Jeor BMR equation and activity level.

Compare estimates from common ideal body-weight formulas using height and sex.

Estimate body-fat percentage using the U.S. Navy circumference method.

Estimate pregnancy week and due date from the first day of the last menstrual period.

Estimate a daily water target from body weight using a simple ml/kg rule of thumb.

Calculate daily macro grams from calories and protein/fat percentages.

Calculate waist-to-height ratio from waist circumference and height.

Calculate lean body mass from weight and body-fat percentage.

About this collection

General fitness and body-measurement estimates; not for medical diagnosis or treatment. 13 free tools.