Weir Equation VO2 VCO2 to REE

Calculate resting energy expenditure using the Weir equation from oxygen consumption and carbon dioxide production measured by indirect calorimetry.

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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 using the Weir equation from oxygen consumption and carbon dioxide production measured by indirect calorimetry

Each component has a specific meaning:

  • Weir equation from oxygen consumption — The weir equation from oxygen consumption recorded for the scenario being assessed.
  • Carbon dioxide production measured by indirect calorimetry — The carbon dioxide production measured by indirect calorimetry recorded for the scenario being assessed.

Note: Interpret the weir ree equation result against the thresholds and context described above.

How to Use

Enter the Weir equation from oxygen consumption, carbon dioxide production measured by indirect calorimetry for the scenario you are assessing. Calculate resting energy expenditure using the Weir equation from oxygen consumption and carbon dioxide production measured by indirect calorimetry. Use the weir ree equation result to inform your calculation.

Frequently Asked Questions