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What this calculator does
Estimate body-fat percentage from body measurements.
How to use this calculator
- Enter the requested measurements using consistent units.
- Review the calculation assumptions before using the result.
- Use trends over time rather than one reading alone.
How to calculate
Choose the calculation mode where available, then enter the values requested by the body fat calculator. Results update immediately.
Worked example
With the example values shown above, the body fat is 29.21%, and the body fat category is Average, and the body-fat weight is 21.9 kg.
Understanding your result
Use trends over time rather than one reading alone.
- Tape-measure formulas are approximate.
- Double-check values and units before calculating.
This calculator provides an educational estimate and is not medical advice or a diagnosis.
Frequently asked questions
What does this body fat calculator do?
Estimate body-fat percentage from body measurements.
How do I use this body fat calculator?
Enter the requested measurements using consistent units.
What does the result mean?
Use trends over time rather than one reading alone.
What should I check before relying on it?
Tape-measure formulas are approximate.
Why do the Navy and BMI methods give different results?
The Navy method uses body-circumference measurements, while the BMI method estimates body fat from BMI, age, and sex alone — they use different inputs and formulas, so some disagreement between the two is expected.
Which method is more accurate?
Circumference-based methods like the Navy formula are generally considered more accurate than BMI-based estimates, since they respond to actual body shape rather than just height and weight, but both are estimates compared with clinical methods like a DEXA scan.