Free Body Fat Calculator — U.S. Navy Method — Uttir
Uttir

Body Fat Calculator

Estimate body fat percentage using the U.S. Navy circumference method. Tape measure and a few seconds — no scales required.

X LinkedIn Reddit Email

Body Fat Calculator — The U.S. Navy method estimates body fat percentage from a few circumference measurements — height, neck, waist, and (for women) hip. It correlates reasonably well with DEXA scans for most adults and only needs a tape measure.

All measurements stay in your browser.

Estimates use the U.S. Navy method and are approximations, not medical measurements or advice. Body composition varies widely — for accurate readings, consult a healthcare or fitness professional.

View source on GitHub

Was Body Fat Calculator useful?

ما هو Body Fat Calculator؟

The U.S. Navy method estimates body fat percentage from a few circumference measurements — height, neck, waist, and (for women) hip. It correlates reasonably well with DEXA scans for most adults and only needs a tape measure.

Enter your measurements in inches, your weight in pounds, and the calculator returns your body fat percentage, the category, the equivalent fat mass, and the equivalent lean mass.

كيفية الاستخدام

  1. Pick your sex

    The formula differs for men and women.

  2. Measure

    Neck (just below the larynx), waist (at the navel for men, narrowest point for women), hip (women, widest point).

  3. Read the result

    See your body fat %, the category, fat mass, and lean mass.

أمثلة

Male, 5'10", 170 lb, neck 15", waist 34"

Typical office worker, light training.

النتيجة: ~19% body fat, fitness category

Female, 5'6", 140 lb, neck 13", waist 28", hip 36"

Active adult.

النتيجة: ~24% body fat, fitness category

الأسئلة الشائعة

أدلة ذات صلة

The 12 Best Free Online Calculators in 2026 That Don’t Upload Your Data

A roundup of the best free online calculators for finance, health, fitness, pregnancy, and everyday math — all of which run in your browser and never send your numbers to a server.

أدوات ذات صلة

حاسبة مؤشر كتلة الجسم

احسب مؤشر كتلة جسمك من الطول والوزن. مجاني، في متصفحك، بدون رفع.

Calorie Calculator (BMR + TDEE)

Calculate your Basal Metabolic Rate (BMR) and Total Daily Energy Expenditure (TDEE). Includes a goal-adjusted daily calorie target.

Macro Calculator

Calculate daily protein, carb, and fat grams from a calorie target. Four common splits: balanced, high-protein, low-carb, and keto.

Ideal Weight Calculator

Calculate your ideal body weight using four clinical formulas (Devine, Robinson, Miller, Hamwi) plus a healthy BMI range.

Last reviewed: 2026-09-25