Estimate your body fat percentage using the U.S. Navy circumference method — one of the most widely used field measurement techniques. Enter your height, waist, and neck measurements (plus hip for women) for an instant estimate.
This calculator provides accurate estimates based on established formulas used by healthcare and fitness professionals. All calculations run entirely in your browser — your personal data is never stored or transmitted.
Measure carefully and consistently. For body measurements, measure at the same time of day (morning before eating is best) and use a soft measuring tape held snugly but not tightly. For date-based calculations, verify your dates are entered correctly — a single day's difference can change week calculations.
Results from this calculator are estimates. Individual variation is significant, and many factors beyond the inputs provided affect real-world outcomes. Use results as a starting point for conversations with qualified healthcare professionals rather than as definitive diagnoses or predictions.
This calculator uses standard, clinically recognized formulas. Results are estimates with typical accuracy within 10–15% of more precise measurement methods. Individual factors not captured in the inputs (genetics, health conditions, medications) can affect real-world results.
No. All calculators on MyCalcApp are 100% free and require no account, registration, or personal information. Simply enter your values and get instant results.
Yes, for any health-related metric. This calculator provides general information, not medical advice. If you have concerns about your health based on any result, schedule a conversation with a qualified healthcare provider.
Yes. MyCalcApp is fully responsive and works on all modern smartphones and tablets. No app download is required — it works directly in your mobile browser.
For body composition metrics, recalculating monthly while tracking lifestyle changes gives you meaningful trend data. More frequent measurements can be misleading due to normal day-to-day fluctuations in weight and hydration.