Health & Fitness Calculators
Achieve your wellness goals with our suite of free online health and fitness calculators. Whether you're tracking your Body Mass Index (BMI), estimating your Basal Metabolic Rate (BMR), monitoring body fat percentage, or calculating daily calorie and macro needs, our tools provide quick, private, and precise calculations. All calculations are performed directly in your browser.
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BMI Calculator
Calculate your Body Mass Index (BMI) in metric or imperial units with health range indicators.
BMR Calculator
Estimate your Basal Metabolic Rate (BMR) using the Mifflin-St Jeor equation.
TDEE Calculator
Estimate your Total Daily Energy Expenditure (TDEE) based on your activity level.
Calorie Calculator
Estimate daily calorie targets to maintain, lose, or gain weight safely.
Body Fat Calculator
Estimate your body fat percentage using the U.S. Navy Method.
Ideal Weight Calculator
Calculate reference weight estimates using historical formulas (Devine, Robinson, and Miller).
Healthy Weight Calculator
Estimate a target weight range based on the standard Normal BMI range (18.5 – 24.9).
Macro Calculator
Calculate your daily target grams for protein, fat, and carbohydrates.
Protein Calculator
Estimate your daily protein requirements based on your body weight and activity level.
Lean Body Mass Calculator
Estimate your Lean Body Mass (LBM) using the Boer formula or a known body fat percentage.
Body Surface Area Calculator
Calculate your total Body Surface Area using the standard Mosteller formula.