Health & Fitness tools
Health and fitness calculators to track the numbers that matter, body and weight metrics, calories and nutrition, and training targets. Each runs privately in your browser and is for general information, not medical advice.
Popular Health & Fitness tools
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BMI Calculator
Find your body mass index from your height and weight, in metric or imperial, and see which healthy-range band you fall into. Calculates instantly in your browser.
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Ideal Weight Calculator
Estimate a healthy target weight for your height and sex using the four standard clinical formulas (Robinson, Miller, Devine, and Hamwi) plus the healthy BMI range. Runs in your browser.
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Body Fat Calculator
Estimate your body-fat percentage with the U.S. Navy circumference method, just a tape measure for neck, waist, and (for women) hips. Shows your fitness category. Calculates in your browser.
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Lean Body Mass Calculator
Estimate your lean body mass (everything except fat) from your height, weight, and sex using the Boer formula. Calculates privately in your browser.
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Waist-to-Height Ratio Calculator
Divide your waist by your height to get the waist-to-height ratio, a simple, strong indicator of health risk that works across ages and body types. Calculates in your browser.
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Body Surface Area Calculator
Estimate body surface area (BSA) from height and weight using the Mosteller, Du Bois, Haycock, Gehan-George, and Boyd formulas, in metric or imperial. Calculates in your browser.