What Is a Good Fev1 Score

Percentage of predicted FEV1 valueResult80% or greaternormal70%–79%mildly abnormal60%–69%moderately abnormal50%–59%moderate to severely abnormal

What is a normal FEV1?

The normal value for the FEV1/FVC ratio is 70% (and 65% in persons older than age 65). When compared to the reference value, a lower measured value corresponds to a more severe lung abnormality. (See table below.) Restrictive lung diseases can cause the FVC to be abnormal.

What FEV1 qualifies for disability?

In order to qualify for benefits, you must meet one of the following requirements: COPD, due to any cause, with a forced expiratory volume one (FEV1) that is equal to or lower to the minimum for your height, between 1.05 for those who are five feet and 1.65 or those who are six feet.