Body Fat Percentage Calculator

Calculate your body fat percentage accurately using the U.S. Navy method — just a tape measure required.

Enter your gender, height, and body measurements to calculate body fat percentage using the proven U.S. Navy formula — no body fat scale or gym equipment needed.

Your Measurements

cm
kg
Circumference Unit
cm
cm

All measurements should be taken at the narrowest point.

Your Body Fat

13.7%

Athletic
0%10%20%30%40%50%+

Fat Mass

9.6 kg

Lean Mass

60.4 kg

Recommended Daily Steps

10,000

Body Fat Categories

American Council on Exercise (ACE) classification for men

CategoryBody Fat Range
Essential Fat2–5%
Athletic6–13%
Fitness14–17%
Acceptable18–24%
Obese25%+

Understanding Body Fat Percentage

Body fat percentage is a more accurate measure of fitness than BMI alone. While BMI only considers weight and height, body fat percentage distinguishes between fat mass and lean mass (muscle, bone, water).

Common Questions

What is a healthy body fat percentage?

For men, a fitness range of 14–17% and acceptable range of 18–24% are considered healthy. For women, fitness falls between 21–24% and acceptable between 25–31%. Athletes typically carry less — 6–13% for men and 14–20% for women.

How accurate is the Navy method?

The U.S. Navy method is typically within 3–4% of a DEXA scan result, making it one of the most accurate tape-measure methods available without equipment. Accuracy improves when measurements are taken carefully and consistently.

Where should I measure my waist?

Measure your waist at the narrowest point, usually at or just above the navel. Keep the tape measure parallel to the floor and measure after exhaling normally — do not suck in your stomach.

What's the difference between body fat and BMI?

BMI only uses height and weight, so it cannot distinguish between fat and muscle. A muscular athlete may have a high BMI but low body fat. Body fat percentage is a more precise indicator of actual body composition and health risk.

How can I reduce body fat?

Combine regular walking or cardio with strength training and a modest calorie deficit. Aim for 0.5–1 kg of fat loss per week. Daily step goals of 10,000+ steps are an effective and sustainable way to increase calorie expenditure without intense exercise.

Track Your Health Journey

Pair your body composition goals with daily step tracking in Steps.

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