Navy Body Fat Calculator
Circumference method with step-by-step measurement guidance.
BMI Calculator
Quick BMI with adult categories, caveats, and next steps.
Waist-to-Height Ratio
Central adiposity risk check (aim < 0.5 for most adults).
Need an at-home plan? Run the calculators, compare results, then try the AI photo scan for faster follow-up readings.
Compare results side by side
Use the comparison worksheet to log BMI, waist-to-height, and Navy method values together. You’ll see how estimates stack against each other and when it’s time to book a DEXA or upgrade to AI analysis.
Open comparison worksheetStep up to image-based assessment
Already tried the calculators? Upload a photo and get a fast estimate. Accuracy improves when you calibrate to your last DEXA or BIA reading.