Free Body Fat from BMI calculator with clear step-by-step results.
The Deurenberg equation estimates body fat from BMI, age and sex.
Formula
Body fat % ≈ 1.2×BMI + 0.23×age − 10.8×sex − 5.4
Estimates are general guidance — consult a healthcare professional for personal medical advice.
The Deurenberg equation estimates body fat from BMI, age and sex.
A population estimate — accurate only on average.