Health & Fitness Calculators

Calculate BMI, BMR, TDEE and calorie targets, ideal body weight and daily water intake with science-based formulas. Free, instant and private.

5 free tools

Body Mass Index in metric or imperial units, with WHO category, healthy weight range and a visual gauge.

Use this BMR calculator to estimate your Basal Metabolic Rate, the calories your body burns at rest, with Harris-Benedict and Mifflin-St Jeor.

Estimate total daily energy expenditure and the calorie targets to lose, maintain or gain weight.

Ideal body weight from your height using the Devine formula, compared with Robinson, Miller and Hamwi.

Use this water intake calculator to estimate how much water to drink each day from your weight, exercise and climate.

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