Body Fat % Calculator (U.S. Navy Method)

Accurate body fat percentage, lean body mass, and fat mass estimates with independent unit controls and anatomical placement cues.

Gender

Height

Weight

Neck Circumference

Measure just below larynx (Adam's apple), tape sloping slightly downward.

Waist Circumference Men: horizontally across navel. Women: at narrowest natural waistline.

Body Fat Percentage: 15.4%
Body Fat Category: Fitness (14-17%)
Fat Mass: 11.6 kg
Lean Body Mass: 63.4 kg

For Coaches & Bloggers: Embed this tool

Are you a personal trainer, coach, or fitness blogger? Embed this free, verified Body Fat % Calculator (Navy Method) widget directly into your client portal or blog article with automatic responsive styling.

<div style="max-width:420px;margin:20px auto;border:1px solid #e2e8f0;border-radius:12px;padding:20px;font-family:system-ui,-apple-system,sans-serif;background:#ffffff;box-shadow:0 4px 12px rgba(0,0,0,0.06);text-align:center;">
  <h4 style="margin:0 0 8px;font-size:1.1rem;color:#0f172a;">Body Fat % Calculator (Navy Method)</h4>
  <p style="font-size:0.88rem;color:#64748b;margin:0 0 16px;line-height:1.45;">Estimate body fat percentage, lean body mass, and fat mass based on anthropometric circumference measurements.</p>
  <a href="https://planworkouts.com/calculators/body-fat/" target="_blank" rel="noopener" style="display:inline-block;background:#ff3b2f;color:#ffffff;padding:10px 20px;border-radius:6px;text-decoration:none;font-size:0.9rem;font-weight:600;">Open Calculator &rarr;</a>
  <div style="margin-top:12px;font-size:11px;color:#94a3b8;">Free tool provided by <a href="https://planworkouts.com/" target="_blank" rel="noopener" style="color:#64748b;font-weight:600;text-decoration:none;">PlanWorkouts</a></div>
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