## How much do you exhale in a day?

In one day, the average person breathes out around 500 litres of the greenhouse gas CO2 – which amounts to around 1kg in mass.

What volume of air do you breathe in a day?

Every day, you breathe in just over 2,000 gallons of air—enough to almost fill up a normal-sized swimming pool. That’s a lot of air. It’s the amount needed to oxygenate approximately 2,000 gallons of blood pumped through your heart daily.

### Do we inhale and exhale the same amount?

Inhaled air is by volume 78\% nitrogen, 20.95\% oxygen and small amounts of other gases including argon, carbon dioxide, neon, helium, and hydrogen. The gas exhaled is 4\% to 5\% by volume of carbon dioxide, about a 100 fold increase over the inhaled amount.

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### What is the size of a lung?

In the normal adult, the lungs weigh approximately 1000 g. Lung volume increases from about 250 mL at birth to 6000 mL in the adult. The height of a normal adult lung is 27 cm at total lung capacity, but in the range of normal breathing it is approximately 24 cm in height.

Is respiration of 18 good?

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.

## How much oxygen do we exhale?

The permanent gases in air we exhale are roughly 78 per cent nitrogen, 15 to 18 per cent oxygen (we retain only a small amount), 4 to 5 per cent carbon dioxide and 0.96 per cent argon, the CO2 being of course used by plants during photosynthesis.

## How much oxygen do we inhale and exhale?

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.

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How much percentage of oxygen is expired?

Inhaled and exhaled air

Gas \% in inhaled air \% in exhaled air
Oxygen 21 16
Carbon dioxide 0.04 4
Nitrogen 79 79
NB These figures are approximate.