How big is Saturn compared to Neptune?
2.4×wider than Neptune
Saturn is 2.4× wider than Neptune — 116,460 km across against Neptune’s 49,244 km. By volume, about 13 Neptunes would fit inside Saturn. Saturn has 5.6× Neptune’s mass.
▶ See Saturn and Neptune in 3D
Side by side
Diameter
Saturn 116,460 km · Neptune 49,244 km
Width ratio
Saturn is 2.4× wider
Volume
13 Neptunes fit inside Saturn
Mass
Saturn is 5.6× Neptune
Gravity (Saturn · Neptune)
10.4 m/s² · 11.2 m/s²
Distance from Sun
9.58 AU · 30.1 AU
Saturn’s ring system spans about 280,000 km — more than five times Neptune’s entire diameter — but in most places it is only around ten metres thick.
What sets them apart
Saturn is a gas giant of hydrogen and helium; Neptune is a smaller, denser ice giant. Saturn is well over twice Neptune’s width and more than five times its mass. Yet Neptune, far smaller and colder, whips up the fastest winds measured on any planet — over 2,000 km/h.
Ratios are easy to nod along to and impossible to picture. In the interactive view, switch to True scale to see Saturn and Neptune at their honest relative sizes.
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 Found something out of date?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.