- from Lungs
Lung capacity is how much air goes into and out of our lungs.
It depends on a person’s age, size, and fitness. Cyclists and runners have a lot of it. Smokers have less. On average, lungs can hold about 13 pints. That’s about ten times the amount of air in a normal breath. But how much air is that? The answer depends on what you’re doing and where you live. Lungs hardly ever work to full capacity. We usually use about one-third of our capacity. Here’s how it breaks down.