肺容量是指呼吸周期中不同阶段肺中通过的气体容积。通过测定肺容积指标可判定患者是否患有各种呼吸道疾病。

Lung volumes and lung capacities refer to the volume of air associated with different phases of the respiratory cycle. Lung volumes are directly measured; Lung capacities are inferred from lung volumes.

The average total lung capacity of an adult human male is about 6 litres of air.