Earth has roughly 100 times more atmospheric pressure than mars and 100 times less than venus.
The atmospheric pressure which is also known as barometric pressure is the pressure within the atmosphere of Earth.
At ground level, the Martian atmosphere has a pressure of 6.518 millibars or 0.095 psi as compared to the atmospheric pressure of earth of 14.7 psi.
The atmospheric pressure at the surface of Venus is about 92 times that of the Earth, similar to the pressure that is found 900 m below the surface of the ocean. The atmosphere has a mass of about 93 times the mass of the Earth's total atmosphere.
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