How much oxygen would you need to survive 1 day in space?

To survive one day in space, an average human requires about 550 liters of oxygen. This is based on a consumption rate of approximately 0.84 kilograms of oxygen per day for an adult at rest. However, this amount can vary depending on factors like activity level and individual physiology. In a space environment, life support systems would need to provide this oxygen, as there is none available in the vacuum of space.