RMR Calculator

How to Calculate Resting Metabolic Rate (RMR)

Calculating your Resting Metabolic Rate (RMR) is crucial for understanding your body's basic energy needs. Here's a detailed explanation of how to calculate your RMR:

RMR Formula

The formula used to calculate RMR is known as the Mifflin-St Jeor equation:

For males: $$RMR=10W+6.25H-5A+5$$

For females: $$RMR=10W+6.25H-5A-161$$

Where:

• $RMR$ is Resting Metabolic Rate in calories per day
• $W$ is weight in kilograms
• $H$ is height in centimeters
• $A$ is age in years

Calculation Steps

1. Determine your weight in kilograms, height in centimeters, and age in years.
2. Choose the appropriate formula based on your sex.
3. Plug your values into the formula.
4. Perform the calculations in order: multiplication first, then addition and subtraction.
5. The result is your RMR in calories per day.

Example Calculation

Let's calculate the RMR for a 30-year-old male who is 180 cm tall and weighs 75 kg.

Using the male formula:

$$\begin{array}{rl}RMR& =10(75)+6.25(180)-5(30)+5\\ & =750+1125-150+5\\ & =1730\text{ calories/day}\end{array}$$

Therefore, this individual's Resting Metabolic Rate is approximately 1730 calories per day.

Visual Representation

This pie chart illustrates the contribution of each component to the total RMR calculation in our example. The weight component (blue) and height component (red) make up the largest portions, while the age component (yellow) and the constant (green) have smaller contributions.