Health calculators
made simple
Free online calculators for all your health and fitness math.
Most popular calculators
TDEE Calculator
Total Daily Energy Expenditure
Calculate the total calories your body burns each day, including activity.
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BMR Calculator
Basal Metabolic Rate
Calculate the calories your body burns at complete rest.
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BMI Calculator
Body Mass Index
Calculate your BMI with context on what it means and where it fits.
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Body Fat Calculator
Body composition estimate
Estimate your body fat percentage using published formulas.
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Macros Calculator
Protein, carbs and fats
Split your daily calories into macros for your goal.
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Hydration Calculator
Daily water intake
Calculate your daily water needs by weight and activity.
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About Health Calculations
We make free, intuitive calculators for everyday health and fitness questions.