Rmr Calculator
Calculate your Resting Metabolic Rate (RMR) using the Mifflin-St Jeor equation. RMR is the number of calories your body needs at complete rest.
Published by:
isCalculator Editorial Team
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How to Use the RMR Calculator
This calculator estimates your Resting Metabolic Rate (RMR) using the Mifflin-St Jeor equation. RMR is the calories your body burns at rest.
- Enter your Age (years, between 15 and 100).
- Select your Gender (Male or Female).
- Enter your Weight in kilograms (kg, between 20 and 300).
- Enter your Height in centimeters (cm, between 50 and 250).
- Click "Calculate RMR".
Your result will show as kcal/day along with the formula used. If inputs are invalid, an error message will appear. All values must be in metric units.
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Frequently Asked Questions
Resting Metabolic Rate (RMR) is the number of calories your body needs to perform basic life-sustaining functions like breathing, circulation, and cell production while at rest.
RMR and Basal Metabolic Rate (BMR) are similar, but RMR is slightly higher and measured under less strict conditions. Both are used to estimate resting energy expenditure.
The Mifflin-St Jeor equation is a widely used formula to estimate RMR. 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.
