Body Fat Percentage Calculator
Estimate your body fat percentage using the US Navy method and BMI-based method.
Overview
The US Navy circumference method estimates body fat from height and girth measurements: neck and waist for men, with hip added for women. It was adopted because a tape measure is cheap, portable and requires no trained operator, making fleet-wide assessment practical where hydrostatic weighing or DEXA scanning would not be.
Body Fat (US Navy Method)
%
Body Fat (BMI Method)
%
BMI
Body Fat Categories
| 분류 | 남성 | 여성 |
|---|---|---|
| Essential Fat | 2 – 5% | 10 – 13% |
| Athletes | 6 – 13% | 14 – 20% |
| Fitness | 14 – 17% | 21 – 24% |
| Average | 18 – 24% | 25 – 31% |
| 비만 | ≥ 25% | ≥ 32% |
The US Navy method uses circumference measurements and is a widely accepted estimation. For more accurate results, consider DEXA scanning or hydrostatic weighing. Consult a healthcare professional for personalized advice.
How to Use
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1
Enter your values
Type your numbers into the Body Fat Percentage Calculator input fields.
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2
Adjust the options
Choose the units, method, or region that fits your situation, or apply a quick preset.
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Read the result instantly
The result updates as you type — no submit button, and nothing is sent to a server.
About
Accuracy is moderate — typically within three to four percentage points of a laboratory measurement for people of average build — and degrades at the extremes. Very muscular individuals carry abdominal wall thickness that the waist measurement attributes to fat, while the method underestimates in people with low muscle mass at a given weight.
The BMI-derived alternative uses the Deurenberg equation to estimate fat from body mass index, age and sex. It requires no tape at all but inherits every limitation of BMI, since two people of identical height and weight receive the same estimate regardless of how their mass is distributed. Measurement technique dominates: the waist is taken at the navel, the neck below the larynx, and the tape held snug without compressing tissue.