What Is the Diameter of Mars?


Quick Answer

According to Space.com, Mars has a diameter of 6,794 kilometers or 4,222 miles. Universe Today says this is approximately 53 percent of Earth’s diameter. Next to Mars, Mercury is the smallest planet in the solar system with a diameter of 4,878 kilometers.

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Full Answer

According to Space.com, Mars is a desert planet with an oblate spheroid shape. Its circumference from pole to pole is 21,244 kilometers, or 13,200 miles. It rotates on its axis every 24.6 hours. The highest mountain in the solar system, Olympus Mons, can be found on Mars. Universe Today says the average distance from Mars to the sun is 228 million kilometres.

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