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Body Fat Estimator
Estimate adult body fat using circumference or a BMI-based equation.
Population-based approximations, not diagnoses. Circumference equations use inches internally; choose the formula sex category. BMI-based estimates can be inaccurate for muscular bodies. Skinfold measurement is not included.
- Estimated body fat
- 17.01%
- Estimated fat mass kg
- 12.76
- Estimated lean mass kg
- 62.24
How to use Body Fat Estimator
Enter your inputs above, choose the available mode, and review the results. Copy or download options appear where supported. These tools process your inputs in your browser.
Population-based approximations, not diagnoses. Circumference equations use inches internally; choose the formula sex category. BMI-based estimates can be inaccurate for muscular bodies. Skinfold measurement is not included.
Health results are general estimates and cannot establish a diagnosis or an individual treatment plan. Review important decisions with a qualified clinician.
BMI equation reference: Deurenberg et al. (1991).
Frequently asked questions
Are my inputs uploaded?+
No. These tools process entered text, numbers and selected files locally in your browser. Invoice templates are saved on your device only when you explicitly choose to save them.
Can I use this tool for free?+
Yes. No account is required. Estimates depend on your inputs and the assumptions explained on this page.