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Reference Value Calculator


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

Optional Observed Values Below – Enter to calculate Percent Predicted

Calculated Values
FVC (L)* FEV1 (L)* FEV1/FVC% FEF25-75% (L/s)*
Predicted> Blank Blank Blank Blank
Percent Predicted Blank Blank Blank Blank
Lower Limit of Normal Blank Blank Blank Blank

Disclaimer: This calculator is intended for use with the NIOSH Spirometry Workbook exercises and has NOT been approved by the FDA for clinical use.

© Hankinson Consulting, Inc., 11/25/2003; 5/1/2006