# 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

**Gender**  
Male  
Female

**Height**  
cm  
ft

**Weight**  
kg  
lbs

**Circumference Unit**  
cmin

**Waist Circumference**  
cm

**Neck Circumference**  
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

| Category         | Body Fat Range |
|------------------|----------------|
| Essential Fat    | 2–5%           |
| Athletic         | 6–13%          |
| Fitness          | 14–17%         |
| Acceptable       | 18–24%         |
| Obese            | 25%+           |

## 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.

## How to calculate body fat percentage (Navy method)

Enter neck, waist, hip circumference, height, and sex to estimate body fat percentage using the U.S. Navy formula.

1. **Measure your neck**  
   Measure around your neck just below the Adam's apple with a soft measuring tape.

2. **Measure your waist**  
   For men, measure around the navel. For women, measure at the narrowest point of the waist.

3. **Measure your hips (women only)**  
   For women, add a measurement at the widest point of the hips.

4. **Enter measurements and height**  
   Type all measurements plus your height. The calculator supports metric and imperial units.

5. **Read your body fat percentage and category**  
   The result gives your estimated body fat percentage plus the ACE category (essential fat, athletes, fitness, average, obese).

## Track Your Health Journey

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