Calculators
Free health calculators, in one place.
A small, deliberate set of health calculators — BMI, BMR, TDEE, macros, protein intake, ideal weight, waist-to-height ratio, waist-to-hip ratio, and body fat percentage. Each based on a published standard, each explained in plain language.
Body Fat Percentage Calculator
Body fat estimate from the U.S. Navy circumference method.
BMI Calculator
Body Mass Index, classified with the WHO standard.
Macro Calculator
Daily protein, carbohydrate, and fat targets from your TDEE.
TDEE Calculator
Total Daily Energy Expenditure and maintenance calories.
Protein Intake Calculator
Daily protein target from body weight and fitness goal.
BMR Calculator
Basal Metabolic Rate via the Mifflin-St Jeor equation.
Ideal Weight Calculator
Reference body weight from the Devine and Robinson formulas.
Waist-to-Height Ratio Calculator
Central adiposity estimate from waist size and height.
Waist-to-Hip Ratio Calculator
Body fat distribution, classified by the WHO method.