Calculateur de Masse Grasse
Estimez votre pourcentage de masse grasse avec la méthode des circonférences de l'US Navy. Nécessite seulement un mètre ruban.
Your body fat percentage is the proportion of your total weight that comes from fat versus lean tissue (muscle, bones, organs, and water). It is a more meaningful health metric than weight alone because it distinguishes between fat mass and muscle mass.
This calculator uses the U.S. Navy Method, which estimates body fat percentage using circumference measurements. For men, it uses neck and waist measurements. For women, it also includes hip measurements. While not as accurate as DEXA scans or hydrostatic weighing, this method is free, quick, and provides a reasonable estimate that you can track over time.
Healthy body fat ranges vary by sex and age. For men, 10-20% is generally considered healthy; for women, 18-28%. Athletes often fall at the lower end of these ranges. Track your body fat changes over time with our Measurement Log for a complete picture of your body composition progress.
Comment Mesurer
- Neck: Measure just below the larynx (Adam apple), with tape sloping slightly downward
- Waist (male): Measure at navel level
- Waist (female): Measure at the narrowest point
- Hip (female): Measure at the widest point (largest circumference)
Use a flexible tape measure, keep it snug but not compressing the skin, and measure at the end of a normal exhale.
Comment Fonctionne la Méthode Navy
The U.S. Navy circumference method uses body measurements to estimate body density, which is then converted to a body fat percentage. For men, the formula uses neck and waist circumference along with height. For women, hip circumference is also included. The calculations are based on logarithmic regression equations derived from hydrostatic weighing data.
Based on the U.S. Navy circumference method, validated by Hodgdon and Beckett (1984).
Lié
Track how your body fat changes over time with our Measurement Log - log your waist, chest, arms, and thighs alongside your body fat estimates.
Frequently Asked Questions
What is a healthy body fat percentage?
For men, 10-20% body fat is healthy. For women, 18-28% is healthy. Essential fat minimums are 3-5% for men and 8-12% for women.
How accurate is the Navy body fat method?
The US Navy circumference method has accuracy of about 3-4% when measurements are taken correctly. It is more accurate than BMI but less than DEXA scans.
How do I measure body fat at home accurately?
Use a flexible tape measure at the exact sites specified. Measure in the morning, before eating or exercise, and repeat 3 times for consistency.
Can body fat change without weight change?
Yes — body recomposition. You can lose fat and gain muscle simultaneously, especially as a beginner. The scale may not change but body fat percentage drops.