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Answered 2013-03-22 00:01:22

Size can mean different things.

Mars is just over half the diameter of Earth, and has only 11% as much mass.

These are the most common "size" ratios (mars/earth):

Mass: 0.107 (10.7%)
Mars has 11% of the mass of Earth.

Volume: 0.151 (15.1%)
Mars has 15% of the volume of Earth.

Mean Radius: 0.532 (53.2%)
Mars has a radius about half the radius of Earth.

The equatorial diameter of Mars is 6792 km (4220 miles).
The equatorial diameter of Earth is 12756 km (7926 miles).


Related Questions

Mars is approximately half the size of the Earth.

it's smaller than the Earth, about the size of Mars

The earth is about twice as large (in diameter) as Mars, but the earth's mass (weight) is ten times greater.

Mars is approximately half the size of Earth. The diameter of Mars at the equator is 6,800 kilometers, which is 53 percent of the diameter of Earth.

The planet Mars is smaller than the Earth. It is also smaller than the planet Venus, which is the planet that is closest in size to the Earth (but like Mars, Venus is smaller than the Earth).

Mars can be compared to Earth, because they both have numerous similarities.

The mass of Mars is 10.7% that of Earth.

the earth is polluted and mars isn't :)

it's not much smaller. the only reason it's so much colder on Mars than on earth is because of its distance from the sun.

Mars is only about half the diameter of Earth.

Compared to the sun, it is small.

Comparing diameters, Mars is about 53% the size of Earth. So, the volume of Mars is about 15% of Earth.

The two planets that are closest in size to Earth are it's neighbours: Venus and Mars. Of the two, Venus is nearly the same size, with a diameter of 12,104km (compared to Earth's diameter of 12,756km). Mars is smaller - almost half the size of Earth - with a diameter of 6792km.

a day on mars is 24 hours, 39 minutes and 35 seconds compared to earth.

The gravity of Earth is 2.6 times that of Mars.

Compared to Earth, Mars is a tiny world. In fact, Mars' mass is only 10% the mass of the Earth. Mass of Mars is 0.107 the mass of Earth. Why does Mars have such a low mass? Partly it's because it's so small. Mars has a radius half the size of the Earth. And partly it's because Mars has a much lower density than Earth.

Venus is roughly the same size as Earth. Mars is only half the diameter of Earth and has less than 11% of the mass, and 28.4% of the surface area.

About 2 times less, so if you weigh 50 pounds on Earth, you would weigh about 18(mars is a bit less massive than half the size of earth) on Mars.

one year on mars is about two years on earth

The surface gravity on Mars is about 37% or 3/8 that on Earth.

Mars is 1.57 times the distance Earth is from the Sun.

Mars is a smaller planet, but not the smallest (mercury). Mars is about fifty percent smaller than our earth. the size of the planet go in the order of Mercury, Mars, Venus, Earth, Neptune ,Uranus, Saturn, and Jupiter.

I don't know mars mass all I know is that mars is smaller than earth.

Mars has a similar size to the Earth. There may be life on Mars. Actually, the Earth is almost twice the size of Mars (1.88 --> 1). Venus is much closer to the size of Earth (1.05 --> 1)

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