What This Calculator Estimates
This calculator estimates body fat percentage using circumference measurements. It is useful for general tracking, but it is not a medical assessment.
How to Use This Calculator
- Select the correct sex option for the formula used.
- Enter height and the requested body measurements.
- Use a tape measure consistently for better comparisons.
- Click Estimate Body Fat to view the result.
- Track changes over time rather than relying on one reading.
Related Calculators
BMI · BMR · Waist-Hip Ratio
Frequently Asked Questions
What does this body fat estimate use?
It uses a circumference-based formula with the measurements you enter.
Is the result exact?
No. Tape-measure methods are approximate and can differ from lab or scan-based methods.
Why does the female option ask for hip measurement?
That measurement is part of the common formula used for the selected estimate.
Can measurement technique change the result?
Yes. Small differences in tape placement or posture can affect the estimate.
When should I recalculate body fat?
Recalculate after meaningful changes in measurements or at regular progress check-ins.
This calculator provides informational health estimates only and is not medical advice. Measurement-based formulas can vary from professional assessments.
Last updated: May 11, 2026