BMI, daily calories, body fat, heart-rate zones, and waist-to-height ratio. For general information only.
Body mass index for adults, with the standard weight categories.
Open calculatorEstimated daily calories to maintain weight, using the Mifflin–St Jeor equation.
Open calculatorEstimate body fat percentage from tape measurements (U.S. Navy method).
Open calculatorEstimated maximum heart rate and five training zones.
Open calculatorA simple screening ratio comparing waist size with height.
Open calculatorEstimate your one-rep max from a weight and reps, with training percentages.
Open calculatorBasal metabolic rate using the Mifflin–St Jeor and Harris–Benedict equations.
Open calculatorCommon health and fitness measures — BMI, maintenance calories, body fat, heart-rate zones, and waist-to-height ratio — calculated with widely used formulas and clearly explained.
These tools are for general information only and are not medical advice. Talk to a qualified healthcare professional about your health, especially before changing diet or exercise.