Diameters to scale
Which planet is bigger?
Globes compared by equatorial diameter. This is the visual page. The planet sizes and distances page keeps the distances, years, sunlight times and the 1-metre Sun scale model. They answer different questions.
View Jupiter in 3DOpen the scale-model tables
Jupiter and Saturn
Saturn’s globe is 84% of Jupiter’s width. The rings, which reach about 270,000 km across, are not drawn.
Jupiter 142,984 km · Saturn 120,536 km · Jupiter is 1.19× wider.
Earth and Jupiter
Earth is the small disc. Jupiter is 11.21 times wider.
Earth 12,756 km · Jupiter 142,984 km.
Pick two planets
Choose two planets. The circles use equatorial diameter and leave out rings.
All eight, to one scale
Bar length is equatorial diameter, with Jupiter as the full width. The same numbers are in the table on the sizes and distances page.
Frequently asked questions
Which planet is the biggest?
Jupiter. Its equatorial diameter is 142,984 km, 11.21 times Earth’s, using the NASA Planetary Fact Sheet figures on this site.
Which planet is the smallest?
Mercury, at 4,879 km across, 0.38 times Earth’s.
How much bigger is Jupiter than Earth?
Jupiter is 11.21 times wider than Earth. The circles use equatorial diameter. A volume comparison is the diameter ratio cubed, and this page does not show volume.
How is this different from the sizes and distances page?
The sizes and distances page is the reference: diameters, Sun distances, years, a 1-metre Sun scale model, and the wider fact-sheet table. This page is the visual which-is-bigger comparison. Neither replaces the other.
Are the circles to scale?
Yes, against each other, by equatorial diameter. Saturn’s rings are not included; the circle is the globe. The Sun is 1,391,400 km across, about 109 times Earth’s diameter, and is left off so the planets stay visible. The sizes and distances page shows that larger scale.
Why do Earth and Venus look almost the same?
Venus is 12,104 km across and Earth is 12,756 km. Venus is about 95% of Earth’s diameter.
Diameters: NASA Planetary Fact Sheet, as listed on this site’s planet sizes and distances page. Sun diameter: NASA Sun Fact Sheet, 1,391,400 km. To see real relative sizes in the explorer, open the 3D solar system and set Scale to Real sizes.