Resting Energy Expenditure - Mifflin-St Jeor Equation

Calculate resting energy expenditure (REE) using the Mifflin-St Jeor equation, the most accurate predictive equation for non-ventilated patients. Men: REE = (10 x weight kg) + (6.25 x height cm) minus (5 x age) + 5. Women: REE = (10 x weight kg) + (6.25 x height cm) minus (5 x age) minus 161. Accuracy within 10% of indirect calorimetry in most patients.

Weight
Height
Clinical Guidance

BMI is a screening measure of body size, not a direct measure of body fat. The standard WHO categories are underweight (<18.5), normal (18.5–24.9), overweight (25–29.9), and obese (≥30).

BMI can overestimate body fat in athletes with high muscle mass and underestimate it in older adults with low muscle mass. Interpret it alongside waist circumference and clinical context rather than as a standalone diagnosis.

⚕ Clinical Disclaimer: These calculators are for educational and reference purposes only. Always verify results with qualified clinical judgment and current clinical guidelines. Do not use as a sole basis for medical decisions.
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How It Works

Calculate resting energy expenditure (REE) using the Mifflin-St Jeor equation, the most accurate predictive equation for non-ventilated patients. Men: REE = (10 x weight kg) + (6.25 x height cm) minus (5 x age) + 5. Women: REE = (10 x weight kg) + (6.25 x height cm) minus (5 x age) minus 161. Accuracy within 10% of indirect calorimetry in most patients

Each component has a specific meaning:

  • Mifflin-St Jeor equation — The mifflin-st jeor equation recorded for the scenario being assessed.
  • Most accurate predictive equation — The most accurate predictive equation recorded for the scenario being assessed.

Note: Interpret the mifflin-st jeor ree result against the thresholds and context described above.

How to Use

Enter the Mifflin-St Jeor equation, most accurate predictive equation for the scenario you are assessing. Calculate resting energy expenditure (REE) using the Mifflin-St Jeor equation, the most accurate predictive equation for non-ventilated patients. Men: REE = (10 x weight kg) + (6.25 x height cm) minus (5 x age) + 5. Women: REE = (10 x weight kg) + (6.25 x height cm) minus (5 x age) minus 161. Accuracy within 10% of indirect calorimetry in most patients. Use the mifflin-st jeor ree result to inform your calculation.

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