Our easy-to-use FEV1 Calculator helps you quickly assess your lung function by computing your Forced Expiratory Volume in 1 second (% predicted). Essential for monitoring respiratory health, this tool provides a clear percentage based on your actual and predicted FEV1 values, aiding in the understanding of conditions like COPD and asthma.
Formula:
The FEV1 % Predicted is calculated using a simple ratio:
FEV1 % Predicted = (Actual FEV1 / Predicted FEV1) × 100
- Actual FEV1: Your measured Forced Expiratory Volume in 1 second (Liters).
- Predicted FEV1: The expected FEV1 value for a person of your age, sex, height, and ethnicity (Liters).