Body Fat Percentage Calculator

Calculate body fat using US Navy method or BMI method

Formula

Navy Male: %BF = 495/(1.0324-0.19077×log10(waist-neck)+0.15456×log10(height))-450; Navy Female: %BF = 495/(1.29579-0.35004×log10(waist+hip-neck)+0.22100×log10(height))-450

US Navy method uses circumference measurements. BMI method estimates from BMI and age. Navy method is more accurate.

How to Calculate Manually

1
Select calculation method (Navy or BMI)
2
Select your sex
3
Enter age, height, and required measurements
4
For Navy: measure neck, waist, and hip (women)
5
For BMI: enter weight
6
Calculate using appropriate formula
7
Compare to healthy ranges for your sex

Reference Table

Category	Men	Women
Essential Fat	2-5%	10-13%
Athletes	6-13%	14-20%
Fitness	14-17%	21-24%
Average	18-24%	25-31%
Obese	25%+	32%+

Body Fat Percentage: How to Measure and What It Means

Body fat percentage is a better indicator of health and fitness than weight alone. This guide covers measurement methods, healthy ranges, and how to improve your body composition...

Frequently Asked Questions

Which method is more accurate? The Navy method (circumference measurements) is generally more accurate than BMI method. For highest accuracy, use DEXA scan or hydrostatic weighing.: The Navy method (circumference measurements) is generally more accurate than BMI method. For highest accuracy, use DEXA scan or hydrostatic weighing.
What's a healthy body fat percentage? Men: 10-20% (athletic 6-13%, fitness 14-17%, average 18-24%, obese 25%+). Women: 18-28% (athletic 14-20%, fitness 21-24%, average 25-31%, obese 32%+).: Men: 10-20% (athletic 6-13%, fitness 14-17%, average 18-24%, obese 25%+). Women: 18-28% (athletic 14-20%, fitness 21-24%, average 25-31%, obese 32%+).
Where do I measure neck, waist, and hip? Neck: just below larynx. Waist: at navel (men) or narrowest point (women). Hip: widest point of buttocks (women only). Measure horizontally.: Neck: just below larynx. Waist: at navel (men) or narrowest point (women). Hip: widest point of buttocks (women only). Measure horizontally.

Calculator

Formula

Formula

How to Calculate Manually

Reference Table

Body Fat Percentage: How to Measure and What It Means

Frequently Asked Questions

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