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Body Metrics Calculators

Browse 14 tools, including BMI Calculator, Calorie Calculator, Body Fat Calculator.

BMI Calculator

Calculate adult BMI and its reference category from height and weight.

Estimate adult resting energy using Mifflin–St Jeor and maintenance energy using an explicit activity multiplier.

Estimate adult body-fat percentage from the published circumference equations, with explicit measurement units.

Estimate adult resting energy using Mifflin–St Jeor and maintenance energy using an explicit activity multiplier.

Calculate the adult weight interval corresponding to BMI 18.5–24.9 at the entered height.

Show singleton-pregnancy total weight-gain reference ranges based on pre-pregnancy BMI.

Calculate the waist-to-height ratio used by the Army’s July 2026 body-composition standard.

Calculate fat mass and lean mass from body weight and an entered body-fat estimate.

Calculate the adult weight interval corresponding to BMI 18.5–24.9 at the entered height.

Estimate adult resting energy using Mifflin–St Jeor and maintenance energy using an explicit activity multiplier.

Calculate waist-to-height and waist-to-hip measurement ratios without assigning an unsupported body type.

Estimate adult body surface area using Mosteller’s equation.

Calculate adult BMI and its reference category from height and weight.

Calculate adult BMI and its reference category from height and weight.

14 working tools. Each page explains its inputs, formula and assumptions.