Pulmonology

FEV1 Percent Predicted (NHANES III) calculator

Enter the published formula inputs below to calculate and interpret this score.

Clinical inputs

Observed FEV₁ (L)

Allowed range: 0.3–6 L

Predicted FEV₁ (L)

Allowed range: 0.3–6 L

Result

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Clinical inputs

Observed FEV₁ (L)Accepted range: 0.3 to 6
Predicted FEV₁ (L)Accepted range: 0.3 to 6

Primary source

Hankinson JL et al. Spirometric reference values from a sample of the general U.S. population. Am J Respir Crit Care Med. DOI: 10.1164/ajrccm.159.1.9712108. PMID: 10524213. Scope: Percent predicted FEV1 = observed FEV1 / reference predicted FEV1 × 100; supply predicted FEV1 from NHANES III or GLI reference equations. (1999)

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