Body Fat Calculator

Calculate your body fat percentage using the U.S. Navy method. Enter your measurements and get an accurate estimate.

Enter data

Gender

Male

Female

Height (cm)170 cm

Weight (kg)70 kg

Neck Circumference (cm)38 cm

Waist Circumference (cm)85 cm

Results

Body Fat

17.8%

Obese

Male

Results

Fat Mass

12.5 kg

Lean Mass

57.5 kg

Body Fat Categories

2%6%14%18%25%50%

Essential fat

2-5%

Athlete

6-13%

Fitness

14-17%

Average

18-24%

Obese

25%+

About the Method

The U.S. Navy method uses body circumference measurements to estimate body fat percentage. It is proven accurate and easy to apply without specialized equipment.

Formula::

Male:
Men: %BF = 495 / (1.0324 − 0.19077 × log₁₀(waist − neck) + 0.15456 × log₁₀(height)) − 450

Female:
Women: %BF = 495 / (1.29579 − 0.35004 × log₁₀(waist + hip − neck) + 0.22100 × log₁₀(height)) − 450

How do I measure circumferences correctly?:

Use a soft measuring tape. Measure your neck below the larynx, waist at navel level, and hips at the widest point. Keep the tape horizontal and snug without compressing the skin.

This calculator provides an estimate. For precise measurement, consult a doctor or use DEXA scanning.

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Body Fat Calculator

Calculate your body fat percentage using the U.S. Navy method. Enter your measurements and get an accurate estimate.

Enter data

Gender

Male

Female

Height (cm)170 cm

Weight (kg)70 kg

Neck Circumference (cm)38 cm

Waist Circumference (cm)85 cm

Results

Body Fat

17.8%

Obese

Male

Results

Fat Mass

12.5 kg

Lean Mass

57.5 kg

Body Fat Categories

2%6%14%18%25%50%

Essential fat

2-5%

Athlete

6-13%

Fitness

14-17%

Average

18-24%

Obese

25%+

About the Method

The U.S. Navy method uses body circumference measurements to estimate body fat percentage. It is proven accurate and easy to apply without specialized equipment.

Formula::

Male:
Men: %BF = 495 / (1.0324 − 0.19077 × log₁₀(waist − neck) + 0.15456 × log₁₀(height)) − 450

Female:
Women: %BF = 495 / (1.29579 − 0.35004 × log₁₀(waist + hip − neck) + 0.22100 × log₁₀(height)) − 450

How do I measure circumferences correctly?:

Use a soft measuring tape. Measure your neck below the larynx, waist at navel level, and hips at the widest point. Keep the tape horizontal and snug without compressing the skin.

This calculator provides an estimate. For precise measurement, consult a doctor or use DEXA scanning.

Similar calculators

BMI Calculator

Calculate your Body Mass Index and healthy weight range

Ideal Weight

Calculate your ideal weight using different formulas

Calorie Calculator

Calculate daily calories for your fitness goals