Calcul de la masse grasse pour les hommes
Masse grasse à partir de mesures au ruban.
Saisissez vos données pour voir votre résultat.
What body fat percentage tells you
Your weight on the scale, and the BMI built from it, cannot tell muscle from fat. Body fat percentage can. It estimates how much of your total weight is fat tissue, which is the part most closely tied to health and how your body actually looks and performs.
This is the honest read that a single weight number misses. Two people can share the exact same BMI while one carries lean muscle and the other carries far more fat. Their BMI is identical, but their bodies, and their risks, are not. Body fat percentage is how you see that difference.
The U.S. Navy tape method
This calculator uses the U.S. Navy body fat method, a circumference formula that needs only a tape measure and your height. It estimates body fat from the sizes of a few body parts, no scan or special device required.
You measure your neck and waist for everyone, plus your hips if you are a woman. The neck goes just below the larynx, the waist at the navel, and the hips at the widest point. Keep the tape level and snug but not tight, and breathe normally.
Men: %fat = 86.010 × log10(waist − neck) − 70.041 × log10(height) + 36.76
The women's version adds the hip measurement. You do not need to do the maths: enter your numbers above and the body fat percentage calculator handles the formula and unit conversion for you. To measure body fat at home reliably, measure at the same time of day and write your numbers down each time.
Healthy ranges for women and men
Women naturally carry more essential fat than men for hormonal and reproductive reasons, so a healthy body fat percentage for women sits higher than for men at every level. The body fat percentage chart below shows the commonly cited ranges.
| Category | Women | Men |
|---|---|---|
| Essential fat | 10-13% | 2-5% |
| Athletes | 14-20% | 6-13% |
| Fitness | 21-24% | 14-17% |
| Average | 25-31% | 18-24% |
| Above average / obese | 32%+ | 25%+ |
Most people are healthiest in the fitness or average bands. Lower is not automatically better, since dropping below essential fat harms your health.
How accurate it is, and where it stops
The tape method is an estimate, not a clinical scan. For most people it lands within about 3 to 4 percentage points of a lab measurement, which is solid for a free home method. It works best when you measure carefully and the same way every time.
Its limits are honest ones. A tight tape, the wrong spot, or an unusual body shape can throw the number off, and the formula assumes a typical fat distribution. Treat the result as a reliable guide to your range and your trend, not a decimal-perfect verdict.
How to act on your number
A single body fat reading is a starting point. The value comes from pairing it with the rest of your picture and watching it move over time.
Check your BMI alongside it for the fuller picture, look at your fat-free mass index to see how much muscle sits under that fat, and use the muscle tracker to follow your body fat and lean mass across weeks. The direction you are heading tells you far more than any one measurement.
Questions fréquentes
What is a good body fat percentage?
A good body fat percentage depends on your sex and goals. For most women a fitness range of 21 to 24 percent and for most men 14 to 17 percent is healthy and sustainable. Athletes sit lower, and a small amount of essential fat is always needed. Use the body fat percentage chart below as a general guide, not a strict target.
What is a healthy body fat percentage for women?
A healthy body fat percentage for women usually falls between 21 and 31 percent, covering the fitness and average ranges. Women carry more essential fat than men for hormonal and reproductive health, so dropping too low can cause problems. Below roughly 14 percent is athlete territory and below 10 percent risks your health.
What is a healthy body fat percentage for men?
A healthy body fat percentage for men typically sits between 14 and 24 percent, spanning the fitness and average ranges. Men need only 2 to 5 percent essential fat. Athletes often reach 6 to 13 percent, while 25 percent and above is considered obese. Where you land matters less than your waist trend and overall health.
How accurate is the U.S. Navy body fat method?
The U.S. Navy body fat method is a tape measurement formula, so it estimates rather than measures. For most people it lands within about 3 to 4 percentage points of a clinical scan, which is good for a free home method. Accuracy drops if you measure in the wrong spot or pull the tape too tight, so measure carefully and consistently.
How do I measure body fat at home?
To measure body fat at home with the Navy method you need a flexible tape measure and your height. Measure your neck below the larynx, your waist at the navel, and for women the hips at the widest point. Keep the tape level and snug, not tight. Enter the numbers above and the body fat percentage calculator does the rest.
Is body fat percentage better than BMI?
For an individual, body fat percentage is usually more honest than BMI because it estimates how much of your weight is fat rather than muscle. Two people with the same BMI can have very different body fat. BMI is still a useful fast screen across populations, so the two work best together rather than one replacing the other.
À lire aussi
Ce que signifie le pourcentage de masse grasse, ce qui est considéré comme sain chez les femmes et les hommes, et comment se comparent les méthodes de mesure courantes.
Le BMI et la masse grasse mesurent des choses différentes. Voici quand chacun est utile et pourquoi la masse grasse l'emporte généralement pour comprendre votre santé.
La balance ne vous indique que votre poids total. La composition corporelle montre si vous perdez de la graisse ou des muscles, et c'est ce qui compte vraiment.