Jupiter, the fifth planet from the Sun is the biggest planet in our solar system, the fourth brightest, and has a mass that is equivalent to 317 Earths.

In this article, we will explore in detail exactly how big Jupiter is and how it compares to planet Earth. 

How Big is Jupiter? 

Jupiter’s radius itself is 43,441 miles in diameter (69,911 km). The planet’s fast rotation causes it to be an oblate spheroid, thereby increasing its diameter across its middle. 

Although Jupiter is humongous, it rotates in just 10 hours!

In fact, Jupiter has the shortest day of any planet in our solar system.

This speedy movement causes its equators to bulge, which is why if you happen to see its pictures, it will look less like a perfect sphere and more like a squashed ball.

This slightly oblate spheroidal shape increases Jupiter’s diameter to a whopping 86,881 miles (144,640 km). 

Showing Jupiter as an oblate spheroid
Jupiter as an oblate spheroid (Source)

How Much Bigger is Jupiter Compared to Earth?

Jupiter is much bigger than our planet. With a radius of over 44,000 miles, compared to Earth’s 4,000 miles, it is 11 times larger. The size of Jupiter’s volume compared to Earth’s is even more dramatic: 1,300 Earth’s could fit inside Jupiter.

A popular way is to think of Earth as being the size of a nickel. Then, Jupiter will be a football by comparison.

11 Earth-sized planets to reach Jupiter’s diameter

As a result of its size, Jupiter’s surface area is over 23 billion square miles, which is 122 times more surface area than Earth. Moreover, although the gas giant is supremely massive, its gaseous nature causes its gravity to be only 2.4 times that of Earth.

What’s especially interesting is the comparison of mass. Jupiter is a gas giant, which makes it much less dense than Earth so, even though it has 1,300 times the volume, it is only as heavy as 317 Earths

The gas giant is primarily made up of hydrogen and helium (which makes people wonder if Jupiter’s a failed star) among other gases whereas Earth consists of hard, rocky material. Below is a table showcasing various comparison factors:

Radius (Equitorial)69,911 km6,371 km
Circumference439,263.8 km40,030.2 km
Volume143,128 x 1010 km3108.321 x 1010 km3
Diameter1.326 g/cm35.513 g/cm3
Mass1,898.19 x 1024 kg5.9724 x 1024 kg

How Long Would It Take to Travel Around Jupiter?

It’s one thing knowing the size of Jupiter, but another to understand it. Translating its vastness into terms we understand on our small planet helps.

The following times are all based on non-stop measurements.

  • Time taken to walk around Jupiter (3 mph): 90,982 hours / 3,791 days / 10.4 years
  • Time taken to cycle around Jupiter (15 mph): 18,196 hours / 758 days / 2.1 years
  • Time taken to drive around Jupiter (70 mph): 3,899 hours / 162 days / 5.4 months
  • Time taken to fly around Jupiter (600 mph): 455 hours / 19 days

Jupiter is so vast that a Boeing 747 at full speed, non-stop, would take 19 days to fly all the way around it!

What Does Jupiter Weigh? 

Similar to other planets, Jupiter orbits the Sun, which means it experiences zero gravity. Its free-fall state indicates that Jupiter does not weigh much. Its mass, however, is over 1,900 trillion kgs. 

Jupiter’s mass is 2.5 times greater than all of the other planets’ mass combined, which makes the gas giant the most massive planet in our solar system. 87% of this mass is taken up by Jupiter’s atmospheric gases hydrogen and helium, with other gases contributing much smaller proportions. 

How Much Heavier is Jupiter than Earth?

Jupiter’s mass is 317 times greater than that of Earth, and that’s without factoring in Jupiter’s moons.

Jupiter is the biggest planet in our solar system, so much so that we need 317 Earths to deliver the same mass.

Yet, despite its behemoth size, it rotates speedily and has the shortest day of any planet. What a fascinating place!