Earth
12,756 km (7,926 mi)
Equatorial diameter
Home. Measured across the equator. Diameter: 12,756 km at the equator.
Published
How big is that?
12,756 km is 3.7 times the Moon and 8.9% of Jupiter.
Earth is the 7th largest of the 39 Cosmic Scale objects, and the 7th largest of the 109 objects across all three SizeItUp games.
Size comparison
To scale, smallest to largest: Earth in orange beside the Cosmic Scale objects nearest in size, in teal.
| Object | Size | vs Earth |
|---|---|---|
| MarsThe red planet, home of Olympus Mons. | 6,792 km across | 53% of the size |
| VenusEarth's neighbour, wrapped in thick clouds. | 12,104 km across | 95% of the size |
| Earth | 12,756 km across | – |
| NeptuneThe farthest planet, an ice giant with supersonic winds. | 49,528 km across | 3.9× bigger |
| UranusAn ice giant that spins on its side. | 51,118 km across | 4× bigger |
In other units
| Metres | 12,756,000 |
|---|---|
| Kilometres | 12,756 |
| Miles | 7,926 |
How it's measured
Equatorial diameter. NASA Planetary Fact Sheet.
Planets spin, so they bulge at the equator: the equatorial diameter is a little larger than the distance from pole to pole.
Sources
- nssdc.gsfc.nasa.gov: Earth: 12,756 km.
Checked against the source on .
Could you have guessed it by eye?
Earth is one of the objects in Cosmic Scale, a daily size comparison game: you stretch a shape to the size you think is right beside one you know.