Calculators
Free health calculators, in one place.
A small, deliberate set of health calculators — BMI, BMR, TDEE, ideal weight, and waist-to-hip ratio. Each based on a published standard, each explained in plain language.
BMI
Most popular
BMI Calculator
Body Mass Index, classified with the WHO standard.
WHO BMI Classification
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BMR
BMR Calculator
Basal Metabolic Rate via the Mifflin-St Jeor equation.
Mifflin-St Jeor Equation
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TDEE
TDEE Calculator
Total Daily Energy Expenditure and maintenance calories.
Mifflin-St Jeor Equation Activity Multipliers
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IBW
Ideal Weight Calculator
Reference body weight from the Devine and Robinson formulas.
Devine Formula Robinson Formula
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WHR
Waist-to-Hip Ratio Calculator
Body fat distribution, classified by the WHO method.
WHO Waist-Hip Ratio Methodology
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