Health & Fitness Calculators
These calculators use widely cited formulas: CDC adult BMI categories, the Mifflin-St Jeor equation for resting energy needs, and the US Navy circumference method for body fat. They are screening and planning tools, not a diagnosis.
Check your BMI and healthy weight range, estimate daily calories with the calorie calculator, and estimate body composition with the body fat calculator. Talk to a healthcare professional before making major changes.
All health & fitness calculators
⚖️ BMI Calculator
Calculate your body mass index with US or metric units and see your CDC weight category and healthy weight range.
🍎 Calorie Calculator
Estimate your BMR and daily calorie needs (TDEE) with the Mifflin-St Jeor equation, plus targets to lose or gain weight.
📏 Body Fat Calculator
Estimate body fat percentage with a tape measure using the U.S. Navy circumference method.