Spirometry Reference Value Calculator

Enter Age, Height, Gender and Race. To see Percent Predicted, you must enter observed FVC, FEV1, and FEF25-75% values in the appropriate boxes. Click Calculate to calculate the predicted values.

Reference Source: Gender: Race:
Age: Height:

Optional Observed Values Below - Enter to calculate Percent Predicted
FVC (L): FEV1 (L): FEF25-75% (L/s): FEV1/FVC%:

Calculated Values

FVC (L)*

FEV1 (L)*

FEV1/FVC%

FEF25-75% (L/s)*

Predicted

Percent Predicted

Lower Limit of Normal

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This calculator is intended for used with the exercises and has not been approved by the FDA for clinical use.
© Hankinson Consulting, Inc., 11/25/2003; 5/1/2006