Navy Body Fat
Navy Body Fat: calculated with the published clinical method, with result interpretation. A reference tool that does not replace a doctor's advice.
ℹ Reference calculation based on the published method. It does not replace a clinical examination or a doctor's decision.
Navy Body Fat
Male sex (1 = yes)
Heightcm
Neck circumferencecm
Abdomen at navel (men) / waist (women)cm
Hip circumference (women only)cm
Body fat (US Navy)
17.3%
Abdomen minus neck
48.0cm
More about: Navy Body Fat
What it calculates
The “Navy Body Fat” calculator computes Body fat (US Navy) in % from 5 parameters: male sex (1 = yes), height (cm), neck circumference (cm), abdomen at navel (men) / waist (women) (cm), hip circumference (women only) (cm).
Used by professionals and patients to assess health metrics, dosages, and risks.
Example calculation
With parameters Male sex (1 = yes) = 1, Height = 178 cm, Neck circumference = 38 cm, Abdomen at navel (men) / waist (women) = 86 cm, Hip circumference (women only) = 100 cm the result is 17.3 % (Hodgdon–Beckett formula (US Navy)).
How to use
- Enter male sex (1 = yes), height, neck circumference, abdomen at navel (men) / waist (women) and hip circumference (women only) — each field above is adjustable with a slider.
- Body fat (US Navy) (%) is calculated automatically as you type.
- Check the worked example below to see the formula applied to real numbers.
- Copy the result or bookmark this calculator.
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FAQ
How is BMI calculated?
BMI = weight (kg) / height (m)². Example: 70 kg / (1.75 m)² = 22.9. The WHO normal range is 18.5–24.9; below that is underweight, 25–29.9 is overweight, and 30+ is obese.
Is BMI accurate for everyone?
No. BMI does not distinguish muscle from fat, so athletes may show a high BMI with low body fat. It is also less reliable for teenagers, pregnant people, older adults, and very tall or short individuals.
What are the BMI categories?
Underweight: below 18.5. Normal: 18.5–24.9. Overweight: 25–29.9. Obese class I: 30–34.9; class II: 35–39.9; class III: 40+.
What is a better measure than BMI?
Body fat percentage, waist-to-height ratio (aim for under 0.5), and waist circumference give a clearer picture of health than BMI alone.
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