Global Araç
Body Fat Calculator
Body fat
23.5%
Category
Average
Men — body fat ranges
- Essential fat: 2–5%
- Athletes: 6–13%
- Fitness: 14–17%
- Average: 18–24%
- Obese: 25%+
Uses the US Navy circumference method. Estimates only.
Estimate body fat percentage using the US Navy method — the easiest reliable calculation that only needs a tape measure. Enter sex, height, neck and waist circumference (and hip for women), and the tool returns your body fat % plus a category (essential, athletic, fit, average, or high) using ACE-published ranges.
Results are accurate to within a few percent for most people and much cheaper than a DEXA or BodPod scan. Measure in the morning, relaxed, and use the same tape position every time for good trend data. See BMI calculator for a simpler height/weight metric or ideal weight for target weight math.
Nasıl Kullanılır
- Measure your neck, waist (and hip if female) with a flexible tape.
- Enter sex and height.
- Input each circumference in cm or inches.
- Read your body fat % and category.
Ne Zaman Kullanılır
- Tracking recomposition progress when the scale isn't moving but the tape is.
- Ballpark estimate before paying for a DEXA or BodPod scan.
- Comparing cuts and bulks over multiple months on the same tape at the same time of day.
- Sanity-checking BMI when you're muscular (BMI overstates 'fat' for lifters).
Ne Zaman Kullanılmaz
- Clinical or pre-surgical body composition — get a DEXA scan for medical-grade numbers.
- Elite athletic performance tracking where you need ±1% accuracy.
- Children and adolescents — Navy method is validated on adults only.
Örnek
Male, 5'10" (70 in) Neck: 15 in Waist: 34 in
Body fat: 18.4% Category: Fit (ACE range for men)
A DEXA on the same person might return 17.2% or 19.8% — the Navy method is accurate within ±3% for most adults.
Sık Sorulan Sorular
Why does waist circumference matter so much?
Visceral (belly) fat is the biggest differentiator between body compositions at the same weight. That's why the Navy formula weights waist heavily and why a 2-inch waist drop often corresponds to a 3–4 point body fat drop.
Where exactly do I measure my waist?
At the navel, tape level all the way around, not pulled tight. Do not suck in. Measure in the morning before eating for consistency — a meal can add 0.5–1 inch and distort the percentage by 1–2 points.
Why ask for height if I'm measuring circumferences?
The formula subtracts log10(waist − neck) from a height-based term. Height is a proxy for frame size — a 6'2" person can carry a larger waist at the same body fat as a 5'6" person.
How does this compare to a bioimpedance (BIA) scale?
Cheap BIA scales swing by 3–5% depending on hydration; Navy method is more stable day-to-day because tape doesn't care how much water you drank. For trends, the tape wins.