How big is Uranus compared to Earth?
4.0×wider than Earth
Uranus is 4.0× wider than Earth — 50,724 km across against Earth’s 12,742 km. By volume, about 63 Earths would fit inside Uranus. It has 14.5× Earth’s mass, and its cloud-top gravity is 0.89× Earth’s.
▶ See Uranus next to Earth in 3D
Side by side
Width vs Earth
4.0× wider
Volume vs Earth
63 Earths fit inside
Mass vs Earth
14.5× Earth’s mass
Cloud-top gravity
0.89× Earth (8.7 m/s²)
You’d weigh
62 kg at the cloud tops (if 70 kg here)
Diameter
50,724 km
Line up 4 Earths side by side and they’d just span Uranus’s width — but volume grows with the cube of width, so it takes about 63 Earths to actually fill it.
What that actually feels like
Something enormous hit Uranus early in its history — it orbits the Sun rolling on its side, unique among the planets. It is also the coldest planet, colder even than more-distant Neptune, and has only ever been visited once: Voyager 2 flew past in 1986, our single close-up look.
Ratios on a page are easy to nod along to and impossible to picture. In the interactive view, switch to True scale to see Uranus and Earth at their honest relative sizes — the gap is even more startling than the numbers suggest.
Keep going
✓ Facts verified July 2026
Every figure on this page is a real, rounded value checked against primary sources. Found something out of date? See how we keep it accurate.