Lung Age Calculator / Lung age
Free Phenotypic Age Calculator
Estimate your lung age from FEV1, height, age and sex, and compare your FEV1 and FVC with predicted values.
Your result
Enter your numbers and press the button. Your result appears here.
How lung age is calculated
Lung age is the age of an average healthy non-smoker with the same FEV1 and height. Morris and Temple published the formulas in 1985.
Men: 2.87 × height (in) − 31.25 × FEV1 − 39.375 Women: 3.56 × height (in) − 40 × FEV1 − 77.28
A lung age well above your real age usually reflects smoking damage, which slows when you stop smoking.
Improving PhenoAge
Glucose, CRP and RDW carry the most weight. Better blood sugar control, less inflammation and good nutrition can lower PhenoAge.
FEV1/FVC and lung age
| Result | Meaning |
|---|---|
| FEV1/FVC 0.70 or more | No airflow obstruction |
| FEV1/FVC under 0.70 | Suggests obstruction (GOLD) |
| FEV1 80% of predicted or more | Usually normal |
Common questions
What does a high lung age mean?
Your FEV1 is lower than expected for your age and height, often because of smoking. Stopping smoking slows further loss.
Should I talk to a doctor?
Yes, if the result worries you or if you have new symptoms. These tools support, but do not replace, a clinical assessment.
Sources
- US Social Security Administration. Actuarial life table, 2022 period life table (2025 Trustees Report).
- Levine ME et al. An epigenetic biomarker of aging for lifespan and healthspan. Aging 2018;10:573–591; Liu Z et al. PLoS Med 2018;15:e1002718 (and correction).
- Morris JF, Temple W. Spirometric "lung age" estimation for motivating smoking cessation. Prev Med 1985;14:655–662. Quanjer PH et al. ECSC lung volumes and forced ventilatory flows. Eur Respir J 1993;6 Suppl 16:5–40.
- CDC. STEADI: Stay Independent brochure. Morse JM et al. A prospective study to identify the fall-prone patient. Soc Sci Med 1989;28:81–86.
- Bohannon RW, Andrews AW. Normal walking speed: a descriptive meta-analysis. Physiotherapy 2011;97:182–189. Studenski S et al. Gait speed and survival in older adults. JAMA 2011;305:50–58.
- Mahoney FI, Barthel DW. Functional evaluation: the Barthel Index. Md State Med J 1965;14:61–65. Shah S et al. J Clin Epidemiol 1989;42:703–709.
- Morley JE et al. A simple frailty questionnaire (FRAIL). J Nutr Health Aging 2012;16:601–608. Searle SD et al. A standard procedure for creating a frailty index. BMC Geriatr 2008;8:24.
- Kivipelto M et al. Risk score for the prediction of dementia risk in 20 years among middle aged people. Lancet Neurol 2006;5:735–741. Tombaugh TN, McIntyre NJ. J Am Geriatr Soc 1992;40:922–935.