The short answer: Saturn has a mass of about 5.7 × 1026 kg (roughly 1.25 × 1027 lb), which is around 95 times the mass of Earth.
Saturn weight by type
Saturn is the second-largest planet in the solar system and a gas giant, famous for its rings and for being the least dense planet of all.
| Comparison | Relative mass |
|---|---|
| Saturn mass | about 5.7 × 10²⁶ kg |
| Compared to Earth | about 95 times |
| Compared to Jupiter | about 30% of Jupiter |
| Density | about 0.69 g/cm³ (would float in water) |
What affects Saturn weight
- Gas composition. Saturn is mostly hydrogen and helium, much like the Sun.
- Enormous volume. Its huge size means even low-density gas accumulates into vast mass.
- Very low density. Saturn is the least dense planet, so its mass is lower than its size suggests.
- Core. A dense rocky and metallic core adds a meaningful share of the total mass.
- Measurement via moons. Saturn's mass is calculated from the orbits of its many moons and rings.
How Saturn weight compares
Saturn is about 95 times heavier than Earth, yet it is so low in density that it would float if you could find a bathtub large enough to hold it.
Frequently asked questions
Could Saturn really float in water?
In principle yes, because Saturn's average density is about 0.69 grams per cubic centimeter, less than water. No body of water large enough exists, but the comparison shows just how lightweight its gas makeup is.
How does Saturn's mass compare to Jupiter?
Saturn is about 30% as massive as Jupiter, the only planet heavier than it. Saturn is roughly 95 Earth masses while Jupiter is about 318.
How was Saturn's mass measured?
Saturn's mass is determined from the orbits of its moons and rings, as well as data from spacecraft like Cassini. Their motions reveal the planet's gravitational pull.
