How big is Saturn compared to Mercury?
Data as of July 2026
23.9×wider than Mercury
Saturn is 23.9× wider than Mercury: 116,460 km across against Mercury’s 4,879 km. By volume, about 13,600 Mercuries would fit inside Saturn. Saturn has 1,731× Mercury’s mass.
▶ See Saturn and Mercury in 3D
Side by side
Diameter
Saturn 116,460 km · Mercury 4,879 km
Width ratio
Saturn is 23.9× wider
Volume
13,600 Mercuries fit inside Saturn
Mass
Saturn is 1,731× Mercury
Gravity (Saturn · Mercury)
10.4 m/s² · 3.7 m/s²
Distance from Sun
9.58 AU · 0.39 AU
Saturn’s rings span about 280,000 km: you could lay more than 50 Mercuries side by side across them.
What sets them apart
A ringed giant against the smallest planet. Saturn is almost 24 times wider than Mercury and about 1,700 times its mass. Mercury is a dense, airless ball of rock and iron baked by the Sun; Saturn is a cold hydrogen and helium giant so light for its size that it is less dense than water.
Ratios are easy to nod along to and impossible to picture. In the interactive view, switch to True scale to see Saturn and Mercury 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 Found something out of date?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.