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Resting Metabolic Rate (RMR) Calculator

This calculator estimates your Resting Metabolic Rate (RMR) — the number of calories your body needs at rest to maintain vital functions like breathing, circulation, and cell production. It's based on weight, height, age, and gender using the Mifflin-St Jeor equation.

Calorie Needs at Rest Estimator

Input Fields
w
kg
Your body weight in kilograms
h
cm
Your height in centimeters
a
years
Your age
If enabled, the result will update automatically when you change any value.

Resting Metabolic Rate (RMR) Formula

Formula
$$\text{RMR (Men)} = 10 \cdot W + 6.25 \cdot H – 5 \cdot A + 5 \\[10pt] \text{RMR (Women)} = 10 \cdot W + 6.25 \cdot H – 5 \cdot A – 161$$

Where:

  • $$W$$ = Weight in kg
  • $$H$$ = Height in cm
  • $$A$$ = Age in years


Resting Metabolic Rate (RMR) represents the calories your body uses at rest and is crucial for planning diets, fitness goals, and weight management strategies. It’s slightly different from BMR but often calculated using the same Mifflin-St Jeor formula. RMR is the foundation for determining total daily energy expenditure (TDEE) when physical activity levels are added.

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Mifflin-St Jeor BMR
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