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If you know your lean body mass, this calculator uses the formula developed by Katch and McArdle to give you a very good estimate of your resting metabolism (RMR) (also known as basal metabolism or BMR), which is the minimum calories you burn each day for your body to keep everything functioning.

Input Fields:
Title A title for these calculator results that will help you identify it if you have printed out several versions of the calculator.
US/Metric Choose US or Metric units.
Weight Your current scale weight.
Lean Mass The portion of your weight that is lean (not fat).

Output Fields:
Resting Metabolism Resting Metabolism (RMR) (also known as Basal Metabolism or BMR) is the minimum calories your body needs each day just to perform its most basic functions.
Lean Mass The portion of your weight that is lean (not fat).
Fat Mass The portion of your weight that is fat.

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All calculators are made available as self-help tools for your independent use with results based on information provided by the user. All examples are hypothetical and are for illustrative purposes only. Calculated results are believed to be accurate but results are not guaranteed. Exercise, Fitness, Health, and Weight Loss calculators are not for providing medical advice and should not be used as a substitute for advice from a medical professional. Users are advised to check with a physician before undertaking any strenuous exercise or diet plan.
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Updated 04 Jul 2007