Advertisement

How much oxygen does a person consume in a day?

The average adult, when resting, inhales and exhales about 7 or 8 liters of air per minute. That totals about 11,000 liters of air per day.

Inhaled air is about 20-percent oxygen. Exhaled air is about 15-percent oxygen. Therefore, about 5-percent of breathed air is consumed in each breath. That air is converted to carbon dioxide. So, as far as how much air is actually used, human beings take in about 550 liters of pure oxygen per day.

A person who is exercising uses a lot more oxygen than that. To determine how much air is moving through your lungs, exhale into a plastic bag of known volume. See how long it takes to fill the bag.

Continue Learning about Air Quality

Is the Air in Your Home Polluted?
Is the Air in Your Home Polluted?
Ahhhh, home at last. Time to unwind, kick off your shoes and take a deep breath of . . . pollution? Yep. Indoor air—in homes and offices—can be more ...
Read More
What is particulate matter?
Dr. Michael Roizen, MDDr. Michael Roizen, MD
Particulate matter differs from ozone, carbon monoxide and other pollutants in that the term doe...
More Answers
How can air pollution cause breathing problems?
Dr. Michael Roizen, MDDr. Michael Roizen, MD
Air pollution can aggravate arterial and respiratory problems. A report in the British Medical J...
More Answers
7 Ways to Improve Your Air Quality
7 Ways to Improve Your Air Quality

Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.