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BMR (Katch-McArdle) Calculator

BMR from lean body mass.

Compute basal metabolic rate using the Katch-McArdle formula, which uses lean body mass instead of total weight and is more accurate for lean individuals.

Priya Venkatesan By Priya Venkatesan
Reviewed by Dr. Helena Ortiz
Published Last reviewed 1 min read

Inputs

kg

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

BMR = 370 + 21.6 · LBM (kg)

In depth

Compute basal metabolic rate using the Katch-McArdle formula, which uses lean body mass instead of total weight and is more accurate for lean individuals.