General fitness and body-measurement calculators. All tools are free and work directly in your browser.
8 calculators
Estimate body mass index from height and weight using the standard adult BMI formula.
Estimate basal metabolic rate using the Mifflin–St Jeor equation.
Estimate body surface area using the Mosteller formula.
Estimate daily calorie needs by multiplying estimated BMR by an activity factor.
Calculate average running pace and speed from distance and elapsed time.
Estimate exercise heart-rate zones from age using a simple percentage of estimated maximum heart rate.
Calculate waist-to-height ratio using waist circumference and height in the same units.
Calculate walking pace and speed from distance and elapsed time.