Tidal Volume Calculator
Calculate the ideal tidal volume for mechanical ventilation based on ideal body weight (IBW) using the Devine formula.
Published by:
isCalculator Editorial Team
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How to Use the Tidal Volume Calculator
This calculator estimates tidal volume (mL) for mechanical ventilation using the Devine formula for Ideal Body Weight (IBW) and a standard 6 mL/kg setting. If BMI is provided and >25, it adjusts IBW for obesity.
- Select Gender – Choose Male or Female from the dropdown.
- Enter Height (cm) – Input height in centimeters (e.g., 175). Only metric is supported.
- Enter BMI (optional) – If known, input BMI (kg/m²) between 10–50. Leave blank if unknown.
- Click “Calculate Tidal Volume” – The result displays in mL, with the IBW and formula shown below.
Note: All fields are validated. Height must be 1–300 cm. BMI must be 10–50 if provided. Results are for educational purposes only.
Previous Results
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Frequently Asked Questions
Tidal volume is the amount of air delivered to the lungs during mechanical ventilation, typically calculated as 6 mL per kilogram of ideal body weight.
For males: IBW = 50 + 0.91 × (height in cm - 152.4). For females: IBW = 45.5 + 0.91 × (height in cm - 152.4).
If BMI is greater than 25, an adjusted body weight is used to account for obesity, providing a more accurate tidal volume.
