Get your body fat percentage in under 2 minutes. Combines the US Navy circumference method with AI-powered visual comparison. 100% free, no signup, all calculations run in your browser.
Enter your measurements below. For best accuracy, use a flexible tape measure and follow the measurement guide below.
Not sure if your measurement result looks right? Compare your physique against these standardized body fat reference levels. Pick the one that matches closest. This serves as a second opinion alongside the US Navy formula.
Click a card to select your visual match. The page will highlight which reference image looks closest to your physique.
| Method | Accuracy | Cost | Time |
|---|---|---|---|
| US Navy Method (this tool) | ±2–3% | Free | 2 min |
| DEXA Scan | ±1–2% | $75–150 | 15 min |
| Hydrostatic Weighing | ±1–2% | $40–80 | 30 min |
| Bod Pod | ±1–3% | $40–65 | 10 min |
| Bioelectrical Impedance (smart scale) | ±3–8% | $30–150 | 30 sec |
| Skinfold Calipers | ±3–5% | $5–20 | 5 min |
| Visual comparison (this tool) | ±3–5% | Free | 1 min |
The US Navy method is the same formula used by the Department of Defense for military fitness assessments. Combining it with visual comparison gives you a reliable cross-check — if both methods agree within 2%, you can be confident in the result.