HEALTH & EVERYDAY
Body fat calculator
Estimate body-fat percentage using the US Navy circumference method.
Estimated result
29.7%
- Method
- US Navy female circumference formula
- Measurement system
- Centimetres converted to inches internally
A circumference-based estimate, not a clinical measurement. Measure consistently and do not use the result as a diagnosis.
SOURCES & REVIEW
Checked against official guidance
Last checked 14 July 2026 · Rule version GB-2026.27.1
NHS: Healthy weight ↗COMMON QUESTIONS
Frequently asked questions
Is this an exact quote or tax return?
No. It is an estimate based on the inputs and assumptions shown.
When was this checked?
The method and linked official guidance were reviewed for the current UK release.