Resting Metabolic Rate Calculator
Calculate your Resting Metabolic Rate (RMR) using the Mifflin-St Jeor equation, which estimates the number of calories your body needs at rest.
Published by:
isCalculator Editorial Team
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How to Use the Resting Metabolic Rate (RMR) Calculator
This calculator estimates the calories your body burns at rest using the Mifflin-St Jeor equation. All inputs must be in metric units (kg and cm).
- Enter your Age (years): Provide a number between 1 and 120.
- Select your Gender: Choose either Male or Female from the dropdown.
- Enter your Weight (kg): Use a positive number (e.g., 70.5).
- Enter your Height (cm): Use a positive number (e.g., 175.0).
- Click "Calculate RMR": The result will display your RMR in kcal/day, along with the formula breakdown.
If you see an error, correct the highlighted fields and recalculate. The result shows how many calories you burn at rest daily.
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Frequently Asked Questions
RMR is the number of calories your body needs to perform basic life-sustaining functions like breathing, circulation, and cell production while at rest.
We use the Mifflin-St Jeor equation: For men: RMR = 10 × weight(kg) + 6.25 × height(cm) - 5 × age(y) + 5; For women: RMR = 10 × weight(kg) + 6.25 × height(cm) - 5 × age(y) - 161.
Knowing your RMR helps you understand your baseline calorie needs, which is useful for weight management, diet planning, and assessing metabolic health.
