Body Fat Calculator | Calculate Your Body Fat Percentage

Free online body fat calculator using the U.S. Navy formula. Calculate your body fat percentage based on measurements like neck, waist, and hip circumference.

Calculate Your Body Fat Percentage

MaleFemale

Metric (cm, kg)Imperial (in, lbs)

Age (years)

Weight (kg)

Height (cm)

Neck (cm)

Waist (cm)

Calculate Body Fat

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Common Body Fat Calculations

30 Years Old

Male, 30 years Female, 30 years

40 Years Old

Male, 40 years Female, 40 years

50 Years Old

Male, 50 years Female, 50 years

male Categories

Essential Fat

2-5% - Minimum needed for basic physical and physiological health.

Athletes

6-13% - Typical for competitive athletes and fitness enthusiasts.

Fitness

14-17% - Lean and fit, showing muscle definition.

Average

18-24% - Generally healthy range for most men.

Obese

25+% - Increased health risks, may need lifestyle changes.

female Categories

Essential Fat

10-13% - Minimum needed for basic physical and physiological health.

Athletes

14-20% - Typical for competitive athletes and fitness enthusiasts.

Fitness

21-24% - Lean and fit, showing muscle definition.

Average

25-31% - Generally healthy range for most women.

Obese

32+% - Increased health risks, may need lifestyle changes.

Ideal Body Fat Percentages by Age

male

20 years 8.5%

25 years 10.5%

30 years 12.7%

35 years 13.7%

40 years 15.3%

45 years 16.4%

50 years 18.9%

55 years 20.9%

female

20 years 17.7%

25 years 18.4%

30 years 19.3%

35 years 21.5%

40 years 22.2%

45 years 22.9%

50 years 25.2%

55 years 26.3%

Frequently Asked Questions

How accurate is the U.S. Navy body fat formula?

The U.S. Navy formula is considered accurate within 3-4% of body fat measured by more sophisticated methods like hydrostatic weighing. It's widely used for its convenience and reliability.

What is a healthy body fat percentage?

Healthy body fat percentages vary by gender and age. For men, 14-17% is considered fit, while 18-24% is average. For women, 21-24% is considered fit, while 25-31% is average.

How often should I measure my body fat?

Monthly measurements are typically sufficient to track changes. Body fat percentage changes gradually, and more frequent measurements might not show meaningful differences.

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