Uranus
51,118 km (31,763 mi)
Equatorial diameter
An ice giant that spins on its side. Diameter: 51,118 km, about 4 Earths across.
Published
How big is that?
51,118 km is 4 times Earth and 36% of Jupiter.
Uranus is the 5th largest of the 39 Cosmic Scale objects, and the 5th largest of the 109 objects across all three SizeItUp games.
Size comparison
To scale, smallest to largest: Uranus in orange beside the Cosmic Scale objects nearest in size, in teal.
| Object | Size | vs Uranus |
|---|---|---|
| EarthHome. Measured across the equator. | 12,756 km across | 25% of the size |
| NeptuneThe farthest planet, an ice giant with supersonic winds. | 49,528 km across | about the same |
| Uranus | 51,118 km across | – |
| Saturn (Planet only)The ringed giant. Its height here is the planet's own diameter; the rings stick out sideways. | 120,536 km across | 2.4× bigger |
| JupiterThe largest planet, a ball of gas with a storm bigger than Earth. | 142,984 km across | 2.8× bigger |
In other units
| Metres | 51,118,000 |
|---|---|
| Kilometres | 51,118 |
| Miles | 31,760 |
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: Uranus: 51,118 km.
Checked against the source on .
Could you have guessed it by eye?
Uranus 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.