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Lung Age Calculator

Estimate your lung age from smoking and lifestyle factors.
Your details
Forced expiratory volume in 1 second from a spirometry test.
How it works

Uses the Hankinson (NHANES III) predictive equations, the standard for Caucasian adults in the United States and many European countries.

Lung age is the age at which your measured FEV1 would be average for a healthy person of your height and sex.

Not a medical diagnosis. For clinical interpretation, consult a pulmonologist.

Lung Age
—
years old
Enter your details to estimate your lung age.
Tool Introduction

Lung age compares your measured forced expiratory volume in one second (FEV1) with population reference values. If your FEV1 is lower than average for someone of your height and sex, your estimated lung age is older than your actual age—a simple way to gauge respiratory health.

This calculator uses the Hankinson equations derived from the Third National Health and Nutrition Examination Survey (NHANES III), widely used in clinical and research settings for adults of European ancestry. Results are estimates for educational use only and do not replace medical advice.