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Total lung capacity

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Total lung capacity

Total lung capacity (TLC) is the maximum amount of air the lungs can hold when they are fully inflated. This amount can be measured as part of lung function tests.

To measure total lung capacity, a person sits inside a booth called a plethysmograph and breathes through a mouthpiece while pressure and air flow measurements are collected.

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This information does not replace the advice of a doctor. Healthwise, Incorporated, disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use. Learn how we develop our content.