BMI & Body Composition Calculator

Calculate BMI, BMR (Basal Metabolic Rate), TDEE (Total Daily Energy Expenditure), and body fat percentage. Imperial or metric. Privacy-first: all calculations in your browser.

Age

Gender

Height (cm)

Weight (kg)

Neck circumference (cm)

Waist circumference (cm)

Activity level

Estimates only — not medical advice. Navy body fat method uses circumference measurements.

BMI & Body Composition Calculator

BMI — Body Mass Index

BMR — Basal Metabolic Rate

TDEE — Total Daily Energy Expenditure

Body Fat Percentage (Navy method)

Lean Body Mass