RMR Calculator (Metric)
Your Estimated RMR
0 Calories/day
This represents the number of calories your body burns while at rest in a 24-hour period.
What is Resting Metabolic Rate (RMR)?
Resting Metabolic Rate (RMR) is the total number of calories your body burns when it is completely at rest. It supports vital body functions such as breathing, circulating blood, organ functions, and basic neurological processes. Unlike Basal Metabolic Rate (BMR), which requires strict clinical conditions (like fasting and total physical stillness), RMR is a more practical estimate for daily use.
The Metric Calculation: Mifflin-St Jeor Equation
This calculator uses the Mifflin-St Jeor equation, which is widely considered the most accurate formula for predicting metabolic rates in the modern population. The formula uses metric units (kilograms and centimeters) to ensure precision.
- For Men: RMR = (10 × weight in kg) + (6.25 × height in cm) – (5 × age in years) + 5
- For Women: RMR = (10 × weight in kg) + (6.25 × height in cm) – (5 × age in years) – 161
Example Calculation
Imagine a 35-year-old male who weighs 85 kg and stands 180 cm tall:
RMR = (10 × 85) + (6.25 × 180) – (5 × 35) + 5
RMR = 850 + 1125 – 175 + 5
RMR = 1,805 Calories per day
Why Knowing Your RMR Matters
Understanding your RMR is the cornerstone of any weight management plan. If you know how many calories your body naturally burns, you can more effectively calculate your Total Daily Energy Expenditure (TDEE) by adding your physical activity levels. This allows you to create a specific caloric deficit for weight loss or a surplus for muscle gain with scientific accuracy.