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Body Fat Estimator

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Body Fat Estimator approximates body fat percentage using the Deurenberg formula from BMI, age, and biological sex. Enter height, weight, age, and sex to see the estimated body fat percentage and a general fitness category. This is a statistical estimate — DEXA scan or hydrostatic weighing is more accurate. Runs entirely in your browser.

Related: BMICalorie Calculator (TDEE)Water Intake

Your files and inputs stay in your browser — nothing is uploaded or stored.

Body Fat %

20.1%

Category

Average

Deurenberg formula estimate

Fat Mass

15.1 kg

Lean Mass

59.9 kg

Estimate only (Deurenberg BMI-based). For accurate measurement use DEXA or skinfold callipers.

Body fat percentage estimator

Estimates body fat percentage from BMI, age, and sex using the Deurenberg formula. A rough estimate — accurate body fat measurement requires DEXA scan or hydrostatic weighing. Essential fat: 2–5% (men), 10–13% (women); athletic range: 6–13% (men), 14–20% (women).