Katch-McArdle BMR Calculator

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eniolufe@gmail.com June 19, 2025No Comments

Calculate your Basal Metabolic Rate and Total Daily Energy Expenditure.

Do you know your lean body mass?

I don’t know my LBM I know my LBM I know my body fat %

Choose how you prefer to provide the information needed to calculate your Basal Metabolic Rate (BMR). The Katch-McArdle formula always requires Lean Body Mass, which can either be provided directly, calculated from body fat %, or estimated from your sex, weight, and height.

Sex

Male Female

Age

years

Your age in years. This is collected as general demographic information, though not directly used by Katch-McArdle or Boer formulas.

Weight

Your current body weight. Used in LBM calculation or estimation.

Height

Your height. Used in LBM estimation via the Boer formula.

Body Fat Percentage

Your estimated body fat percentage. An accurate measurement is crucial for calculating Lean Body Mass.

Lean Body Mass

Your Lean Body Mass (LBM) is your total body weight minus your fat mass. Provide this value directly if you already know it.

Activity Level

Select the option that best describes your typical weekly activity level. This multiplier is used to estimate your Total Daily Energy Expenditure (TDEE).

Your Metabolic Insights

Lean Body Mass (LBM)

—

Weight without fat

Basal Metabolic Rate (BMR)

— kcal

Calories burned at rest

Total Daily Energy Expenditure (TDEE)

— kcal

Total calories burned daily

Understanding BMR Formulas:

This calculator always uses the **Katch-McArdle formula** to estimate your Basal Metabolic Rate (BMR), as it is generally considered more accurate for individuals with lower body fat or higher muscle mass because it directly uses Lean Body Mass (LBM).

Your Basal Metabolic Rate (BMR) is the minimum number of calories your body needs at rest. Your Total Daily Energy Expenditure (TDEE) is an estimate of your total daily calorie burn, including physical activity.

These calculations can be helpful for managing weight and understanding energy needs. For personalized health or dietary advice, always consult with a qualified healthcare professional or nutritionist.

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