For Mars, the opposite situation exists. The data table shows that the pressure at the surface of Mars is only 0.6% of the atmospheric pressure at the surface of the Earth! Atmospheric pressure decreases with altitude. On Earth, to reach a pressure of 50% compared to the surface, you would need to be at an altitude of 5,500 meters. At the summit of Mount Everest (8,800 meters) the pressure is about a third (31%) of the surface pressure. To reach a pressure of 10% of the surface pressure, you would need to be at an altitude of 16,000 meters. The atmospheric pressure at the top of the Earth's stratosphere is about 0.1% of the surface pressure.

For Mars, the opposite situation exists. The data table shows that the pressure at the surface of Mars is only 0.6% of the atmospheric pressure at the surface of the Earth! Atmospheric pressure decreases with altitude. On Earth, to reach a pressure of 50% compared to the surface, you would need to be at an altitude of 5,500 meters. At the summit of Mount Everest (8,800 meters) the pressure is about a third (31%) of the surface pressure. To reach a pressure of 10% of the surface pressure, you would need to be at an altitude of 16,000 meters. The atmospheric pressure at the top of the Earth's stratosphere is about 0.1% of the surface pressure.