💪 Health & Fitness

Body Fat Calculator

Estimate body fat using the U.S. Navy method.

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Estimate body fat using the U.S. Navy method. This dedicated page is built for fast, clean calculations and search visibility.

Enter your values, click calculate, and see the result instantly. The page uses a simple, focused layout to improve usability on mobile and desktop.

How to use this calculator

  1. Open the body fat calculator page.
  2. Enter the required values in the form fields.
  3. Click Calculate to see the result and breakdown.
  4. Use the related links to explore similar tools.
Results are estimates. For lending, taxes, trading, nutrition, or medical decisions, verify with a qualified professional.

Body Fat Calculator

Estimate body fat using the U.S. Navy method.

Result
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    What body fat percentage actually means

    Body fat percentage is the proportion of total body mass that is adipose (fat) tissue. Essential fat — the minimum required for bodily function — is approximately 3–5% for men and 10–13% for women (women have more essential fat due to reproductive hormonal requirements). The Navy body fat formula (used in this calculator) estimates body fat from circumference measurements and is accurate within ±3–4% compared to DEXA scans.

    Body fat ranges by fitness level

    • Athletes (men): 6–13%. Athletes (women): 14–20%
    • Fitness (men): 14–17%. Fitness (women): 21–24%
    • Average (men): 18–24%. Average (women): 25–31%
    • Obese (men): 25%+. Obese (women): 32%+

    Body fat percentage is a much better health predictor than body weight or BMI. Visceral fat (around organs, reflected in waist circumference) is the metabolically active type that drives insulin resistance, inflammation, and cardiovascular risk. You can reduce body fat percentage by losing fat, gaining muscle, or both — even if the scale doesn't move significantly.

    Frequently asked questions

    Which body fat measurement method is most accurate?▼
    DEXA scan is the gold standard, accurate to ±1–2%. Hydrostatic weighing is similarly accurate. BIA devices (bathroom scales, hand-held devices) have ±3–8% error and are heavily affected by hydration. The Navy tape measure formula used here is ±3–4%, comparable to most consumer BIA devices. Consistency of method matters more than absolute accuracy for tracking progress.
    Why do men and women have different healthy body fat ranges?▼
    Women require more essential fat (~10–13%) compared to men (~3–5%) due to sex hormones, reproductive organs, and breast tissue. Women have a higher proportion of subcutaneous fat, while men tend toward more visceral fat. The same absolute body fat percentage represents different health implications by sex — this is why ranges are sex-specific.
    Can I lose fat and gain muscle at the same time?▼
    Yes, particularly for beginners and people returning after a break (muscle memory). This is called 'body recomposition.' It's achievable on a mild calorie deficit (–200 kcal) with high protein (2g/kg) and consistent resistance training. Experienced trainees find recomposition slower and typically cycle between deliberate bulking and cutting phases.
    What body fat percentage should I target?▼
    For general health: men 10–18%, women 18–26%. For visible muscle definition: men 10–15%, women 17–23%. Target a body fat range where you feel energetic, strong, and can maintain your eating habits without extreme restriction. Sustainability matters more than hitting a specific number.