Health

Estimate body fat %, fat mass, lean mass, BMI, and compare U.S. Navy and BMI-based results in US or metric units.

Estimate BMR in kcal/day from age, sex, height, and weight, with optional body fat and formula comparison.

Compare ideal weight formulas, see a healthy BMI weight range, and get a quick median summary in lb or kg.

Estimate BMI, adult BMI category, healthy weight range by height, and how far above or below that range your weight is.

Estimate calories burned from weight, activity, time, and MET with preset activities or a custom MET option.

Estimate your 1RM from weight and reps, compare formulas, and get a practical percentage load table in lb or kg.

Estimate your exercise heart-rate zone with a simple age-based method or a more personalized heart rate reserve method.