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How much oxygen does an average person need per day?

Question #71081. Asked by loominitsa.
Last updated Sep 16 2016.

Answer has 2 votes
22 year member
1455 replies

Answer has 2 votes.
According to NASA the average person needs 0.84 kg of O2 per day (day and night activity).

Sep 29 2006, 6:17 PM
Terry star
Answer has 6 votes
Currently Best Answer
Terry star
23 year member
333 replies avatar

Answer has 6 votes.

Currently voted the best answer.
APPROX 550 liters of pure oxygen each day.
The average adult at rest inhales and exhales something like 7 or 8 liters (about one-fourth of a cubic foot) of air per minute. That totals something like 11,000 liters of air (388 cubic feet) in a day.

The air that is inhaled is about 20-percent oxygen, and the air that is exhaled is about 15-percent oxygen, so about 5-percent of the volume of air is consumed in each breath and converted to carbon dioxide. Therefore, a human being uses about 550 liters of pure oxygen (19 cubic feet) per day.


Sep 16 2016, 9:23 PM
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