# How much air does a human breathe in a lifetime?

## How much air does a human breathe in a lifetime?

The volume of one breath can vary a lot, but we are looking for an average to work with, which is the so called “tidal volume”. Tidal volume is the lung volume representing the normal volume of air displaced between normal inspiration and expiration, without applying extra effort.

The normal respiration rate for an adult at rest is 12 to 20 breaths per minute. A respiration rate under 12 or over 25 breaths per minute while resting is considered abnormal. On average, a person at rest takes about 16 breaths per minute.

In a lifetime (of 67.2 years) we have 35,344,512 minutes (so you have about 35 million minutes of breathing space). An average person will breathe 0.5 (liters/breath) x 15 (breaths/minute) x 35,344,512 (minutes/lifetime), which equals 265,083,840 liters/lifetime. More or less 265 million liters of air.

The average respiration rate for a person at rest is about 16 breaths per minute. If a person lives to 80, then that means on average they will take 672,768,000 breaths in a lifetime! Please note this is based on a persons average respiration rate at rest.

But they are still not fully developed. In the first 6 months of your child’s life, the number of air sacs in their lungs rises sharply. After 6 months, the number of air sacs continues to increase, but more slowly. The amount of air your child’s lungs can hold is called lung volume.

Weight of breath The mass of one breath is approximately a gram (0.5-5 g). A litre of air weighs about 1.2 g (1.2 kg/m3). A half litre ordinary tidal breath weighs 0.6 g; a maximal 4.8 litre breath (average vital capacity for males) weighs approximately 5.8 g.

Estimates suggest a baby has around 20-50 million air sacs at birth. The number of air sacs in your child’s lungs will increase rapidly over the first two years of life. New air sacs will keep developing at a slower rate until your child is at least 8.

Respiratory rate: A person’s respiratory rate is the number of breaths you take per minute. The normal respiration rate for an adult at rest is 12 to 20 breaths per minute. A respiration rate under 12 or over 25 breaths per minute while resting is considered abnormal.

For example, during a lifetime, a coal miner may inhale 1,000 g of dust into his lungs. When doctors examine the lungs of a miner after death, they find no more than 40 g of dust. Such a relatively small residue illustrates the importance of the lungs’ defenses, and certainly suggests that they are quite effective.

The air you breathe You breathe about 11,000 liters of air every day. That’s nearly 8 liters every minute and more than 300 million liters over a lifetime.