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Planet size comparison

Line up the planets, the Sun, dwarf planets and the biggest moons at true scale. Pick any two to see how many times wider, heavier and more massive one is than the other.

Planet size comparison chartJupiter88,846 miSaturn74,898 miUranus31,763 miNeptune30,775 miEarth7,926 miVenus7,521 miMars4,220 miMercury3,032 mi

Compare two

  • Jupiter is 11.2 times as wide as Earth.
  • Earth would fit inside Jupiter about 1,321 times by volume.
  • Jupiter has 318 times the mass of Earth.
  • Surface gravity on Jupiter is 23.1 m/s², which is 2.36 times Earth's.
  • Someone who weighs 160 lb on Earth would weigh about 377 lb on Jupiter.

Gas giants and the Sun have no solid surface; their gravity is given at the cloud tops.

Jupiter: 88,846 mi · Earth: 7,926 mi

Planet sizes and data

Diameters are measured at the equator. Mass and gravity are shown next to Earth's so the numbers are easier to picture.

BodyTypeDiameterWidth vs EarthMass vs EarthGravityDay length
SunStar864,576 mi109×330,000×274 m/s²-
JupiterPlanet88,846 mi11×318×23.1 m/s²9.9 h
SaturnPlanet74,898 mi9.45×95×9 m/s²10.7 h
UranusPlanet31,763 mi4.01×15×8.7 m/s²17.2 h
NeptunePlanet30,775 mi3.88×17×11 m/s²16.1 h
EarthPlanet7,926 mi1×1×9.8 m/s²24 h
VenusPlanet7,521 mi0.95×0.82×8.9 m/s²116.8 days
MarsPlanet4,220 mi0.53×0.11×3.7 m/s²24.7 h
GanymedeMoon of Jupiter3,273 mi0.41×0.02×1.43 m/s²-
TitanMoon of Saturn3,200 mi0.4×0.02×1.35 m/s²-
MercuryPlanet3,032 mi0.38×0.06×3.7 m/s²175.9 days
CallistoMoon of Jupiter2,996 mi0.38×0.02×1.24 m/s²-
IoMoon of Jupiter2,264 mi0.29×0.02×1.8 m/s²-
MoonMoon of Earth2,159 mi0.27×0.01×1.6 m/s²29.5 days
EuropaMoon of Jupiter1,940 mi0.25×0.01×1.31 m/s²-
TritonMoon of Neptune1,682 mi0.21×0×0.78 m/s²-
PlutoDwarf planet1,476 mi0.19×0×0.62 m/s²6.4 days
ErisDwarf planet1,445 mi0.18×0×0.82 m/s²15.8 days
CeresDwarf planet584 mi0.07×0×0.28 m/s²9.1 h

The planets in order of size

From largest to smallest, measured across the equator:

  1. 1.Jupiter88,846 mi (142,984 km)
  2. 2.Saturn74,898 mi (120,536 km)
  3. 3.Uranus31,763 mi (51,118 km)
  4. 4.Neptune30,775 mi (49,528 km)
  5. 5.Earth7,926 mi (12,756 km)
  6. 6.Venus7,521 mi (12,104 km)
  7. 7.Mars4,220 mi (6,792 km)
  8. 8.Mercury3,032 mi (4,879 km)

How many Earths fit inside?

Volume grows with the cube of the width, so a planet 11 times wider than Earth holds more than a thousand Earths. The counts below compare volumes and ignore the gaps you would get packing real spheres.

BodyEarths that would fit
Sun1,300,000
Jupiter1,320
Saturn764
Uranus63
Neptune58

How this comparison is drawn

Every body is drawn as a sphere at the same scale, using its mean radius, so the widths you see match the real ratios. Saturn's rings are added for recognition and reach about 2.3 times the planet's radius.

Sizes, masses, gravity and day lengths come from the NASA Planetary Fact Sheet and the NASA Sun Fact Sheet. Figures for the other moons and dwarf planets come from NASA's Jet Propulsion Laboratory. Numbers are rounded, and gas giants are measured where the atmosphere reaches a pressure of one bar.

Planet size questions

How many Earths can fit inside the Sun?

About 1,300,000 Earths would fit inside the Sun by volume. The Sun is about 109 times wider than Earth.

How big is Jupiter compared to Earth?

Jupiter is about 11 times wider than Earth, and around 1,320 Earths would fit inside it. It has 318 times Earth's mass.

What is the largest planet in the solar system?

Jupiter is the largest planet, 88,846 mi (142,984 km) across at the equator. Saturn is second at 74,898 mi (120,536 km).

What is the smallest planet?

Mercury is the smallest planet, 3,032 mi (4,879 km) across. It is smaller than Jupiter's moon Ganymede and Saturn's moon Titan, although both moons have less mass.

Is Pluto smaller than the Moon?

Yes. Pluto is 1,476 mi (2,376 km) across and the Moon is 2,159 mi (3,475 km), so the Moon is about 1.46 times wider than Pluto.

How much bigger is Earth than the Moon?

Earth is about 3.67 times wider than the Moon, and about 49 Moons would fit inside Earth by volume.

Compare heights on Earth

Back on the ground, line up people, animals and buildings with the height comparison chart.

Height Comparison Tool