*Above: 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 10^{22} kg – The mass of the Moon.

5.97 x 10^{24} 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.