Health Calculators
Body metrics and daily energy needs, with clear limits.
BMI Calculator
Calculate body mass index in metric or imperial units and see where it falls in the WHO adult ranges — with the limits of BMI stated honestly.
Calorie Calculator
Estimate your resting metabolism (BMR), daily maintenance calories (TDEE), and a gradual goal target using the Mifflin-St Jeor equation.
BMR Calculator
Free BMR calculator using the Mifflin-St Jeor equation: the calories your body burns at complete rest, from weight, height, age, and sex — in your browser.
Body Fat Calculator
Free body-fat calculator using the US Navy circumference method: estimate body-fat percent from height, waist, neck (and hip) — computed in your browser.
Ideal Weight Calculator
Free ideal weight calculator showing Devine, Robinson, Miller, and Hamwi estimates side by side from your height and sex — with the formulas' clinical origin explained honestly.
Target Heart Rate Calculator
Free target heart rate calculator: research-backed maximum heart rate (208 − 0.7×age, Tanaka) and your personal training zone via the Karvonen heart-rate-reserve method.