What is the volume of Mars' atmosphere?

Mars's atmosphere weighs 25000000000000000 kg as compared to Earth's atmosphere at 5148000000000000000 kg. Which means Mars atmosphere is 1/206th that of Earth's. The volume is best expressed as scale height where Mars is 11.1 km vs. read more

Mars's atmosphere weighs 25,000,000,000,000,000 kg as compared to Earth’s atmosphere at 5,148,000,000,000,000,000 kg. Which means Mars atmosphere is 1/206th that of Earth’s. The volume is best expressed as scale height where Mars is 11.1 km vs. Earth 8.5 km. (for scale height explanation go here 2 - Baratropic Law) The cubic volume is hard to define with any meaning. read more

The "effective volume" of the Earth's atmosphere is about 4.2 billion cubic kilometers. This figure is the surface area of the Earth (509 million square kilometers) times the "effective thickness" of the atmosphere (8.2 kilometers, or about 27,000 ft). read more