Body Fat Calculator
Our body fat calculator uses the US Navy circumference method — one of the most accurate non-equipment-based formulas. Simply enter your neck, waist (and hip for women), and height measurements to get your body fat percentage and see which fitness category you fall into.
Frequently Asked Questions
How is body fat percentage calculated?
This calculator uses the US Navy method. For men: 495 ÷ (1.0324 − 0.19077 × log10(waist − neck) + 0.15456 × log10(height)) − 450. For women, hip measurement is also included. All measurements are in centimetres.
What is a healthy body fat percentage?
For men, 14–20% is considered fitness level and 21–24% acceptable. For women, 21–28% is fitness level and 29–35% acceptable. Essential fat (minimum needed for survival) is around 3–5% for men and 10–13% for women.
Where should I measure waist circumference?
Measure your waist at the narrowest point, usually around the navel level. For the most accurate result, take the measurement in the morning before eating, standing upright with relaxed muscles.
Is the US Navy method accurate?
The US Navy method is accurate to within 3–4% compared to DEXA scans, making it one of the best field methods. It is less accurate for very muscular or very obese individuals. For clinical precision, DEXA or hydrostatic weighing is recommended.