How does the Katch Mc Ardle Calculator work?

First calculate lean body mass (LBM = weight × (100 - %bodyfat) / 100) Then: Then: BMR = 370 + (21.6 × LBM in kg) Then: More accurate than weight-only formulas.

Can you give an example of how to use the Katch Mc Ardle Calculator?

Example: Input 80 kg, 20% body fat gives a result of LBM = 64 kg, BMR = 1755 kcal/day (Accounts for body composition).

Is the Katch Mc Ardle Calculator free to use?

Yes — completely free with no registration, download, or subscription required. All calculations happen instantly in your browser.

How accurate is the Katch Mc Ardle Calculator?

Our Katch Mc Ardle Calculator uses verified mathematical formulas and is accurate to multiple decimal places. Results are calculated in real-time using the same methods used by professionals.

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Katch Mc Ardle Calculator

Katch-McArdle BMR

Lean body mass (kg)

Katch-McArdle formula estimates basal metabolic rate using lean body mass. It's more accurate in muscular or obese individuals.

Symbol	Name	Unit	Description
LBM	weight × (100 - %bodyfat) / 100)	—	weight × (100 - %bodyfat) / 100)

Difficulty:intermediate

References

›Katch Mc Ardle — Wikipedia

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Katch Mc Ardle Calculator

Katch-McArdle BMR

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Katch-McArdle BMR