How much air does the human body inhale in one day?
by 
wickedwillie
ANSWERS: 2
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The average breath is about 500mL and the average breaths per minute is 12. So, 500mL X 12 breaths/ minute X 1440 minutes = 8,640,000 mL of air. Simplifies to 8,640 L per day.
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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. A person who is exercising obviously uses a lot more oxygen than that. You could determine how much air is moving through your lungs by exhaling into a plastic bag of known volume at each breath and seeing how long it takes to fill the bag. http://72.14.209.104/search?q=cache%3AdiqTM73Q_58J%3Ahttp%3A%2F%2Fchemistry.bd.psu.edu%2Faronne%2FAir%2520S'05.pdf%20how%20much%20air%20does%20a%20person%20breathe%20in%20one%20day
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