# Katch-McArdle Calculator

## Katch-McArdle

Another tool that might help you stay healthy and fit is the Katch-McArdle calculator. The Katch-McArdle method may be used to calculate your Basal Metabolic Rate (BMR), which is the bare minimum of calories your body requires to operate on a given day if you don’t exercise. Because it takes into consideration lean body mass, this equation varies from the Harris-Benedict equation.

## What is the Katch-McArdle calculator?

The Katch-McArdle calculator is a simple and quick tool for calculating your BMR. A person’s basal metabolic rate is the amount of energy they utilize at rest over the course of a 24-hour day.

If you’re looking for other formulae for estimating BMR, the Mifflin St Jeor equation is a good place to start.

You may also use the maintenance calorie calculator to figure out how many calories your body need to stay at its present weight.

## What is the Katch-McArdle formula?

To apply the Katch-McArdle formula you need to know your Lean Body Mass:

`BMR = 370 + (21.6 * Lean Body Mass[kg])`

It is also possible to calculate your BMR using this formula if you know:

1. Your body fat percentage, because then lean body mass can be calculated as following:

`LBM = (Weight[kg] * (100 - Body Fat %)/100`

1. Your weight and height to estimate your lean body mass using Boer formula (already built into this calculator):

`LBM (men) = 0.407 * weight [kg] + 0.267 * height [cm] - 19.2`

`LBM (women) = 0.252 * weight [kg] + 0.473 * height [cm] - 48.3`

Choose your calculation method depending on the values you know and answer the first question Do you know your lean body mass? at the top of this calculator.