How Big is the Moon?

Comparison of the size of the Moon and Earth

Image showing the size of the Moon when compared to Earth. Credit: NASA.

4 - The number of Moons in our Solar System that are larger than our Moon - Ganymede, Titan, Callisto and Io.

Diameter of the Moon

3,474 - The diameter of the Moon, in kilometres.

12,756 - The diameter of the Earth, in kilometres.

27% - The size of the Moon's diameter in comparison to Earth.

Circumference of the Moon

10,921 - The circumference of the Moon, in kilometers.

Surface Area of the Moon

37.9 million - The surface area of the Moon, in square kilometers.

510 million - The surface area of Earth, in square kilometers.

Did You Know?

The Moon's surface area is roughly the same as that of the USA, Canada and Russia combined (3.793 x 107 km² to be precise).

44.4 million - The surface area of Asia, in square kilometers, 6.5 million km² larger than the surface of the Moon.

7.4% - The surface area of the Moon expressed as a percentage of the surface area of Earth.

Volume of the Moon

21.9 billion - The volume of the Moon, in cubic km (2.195 x 1010 km³).

1 trillion - The volume of Earth, in cubic km.

2% - The volume of the Moon expressed as a percentage of the volume of Earth.

Mass of the Moon

7.347 x 1022 kg - The mass of the Moon.

5.97 x 1024 kg - The mass of Earth.

1.2% - The mass of the Moon expressed as a percentage of the mass of Earth.

81 - The number of times you could squash the Moon into the Earth.


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