Body Fat Percentage Calculator (BMI Method)

Estimate your body fat percentage using the BMI-based method. This formula uses your BMI and age to estimate body fat.

lbs
ft
in
years

Estimated Body Fat %

21.7 %

BMI25.8
Lean Mass %78.3 %

Estimated Body Fat % vs Weight

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Fórmula

## BMI-Based Body Fat Estimation (Male) **Body Fat % = 1.20 x BMI + 0.23 x Age - 16.2** This formula was developed by Deurenberg et al. and provides an estimate of body fat percentage using BMI and age. Note: This is the male formula. The female formula uses different constants (1.20 x BMI + 0.23 x Age - 5.4).

Ejemplo Resuelto

A 30-year-old male, 180 lbs, 5'10".

  1. 01BMI = (180 x 703) / (70 x 70) = 25.8
  2. 02Body Fat = 1.20 x 25.8 + 0.23 x 30 - 16.2
  3. 03= 31.0 + 6.9 - 16.2 = 21.7%

Preguntas Frecuentes

How accurate is the BMI body fat formula?

This method provides a rough estimate. It tends to overestimate body fat in muscular individuals and underestimate it in older adults. Direct methods like DEXA scans are more accurate.

Who developed this formula?

This formula was developed by Deurenberg, Weststrate, and Seidell (1991) and is widely cited in body composition research.

Aprender

Understanding BMI: What It Means and How to Calculate It

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