Physical size — not orbital distance
Planet Size Comparison — Solar System Diameters vs Earth
Jupiter is 11.21× wider than Earth · about 1,408× Earth’s volume (sphere model)
Pick any two worlds and see mean equatorial diameter in kilometers and miles, diameter ratio, and approximate volume vs Earth (sphere model). Browse a ranked bar chart of all planets plus Pluto, with shareable URLs. Orbital distances live in our Planet Distance Converter—this page is about how wide each globe is.
Compare two worlds
Visual scale — Mean equatorial diameter
Circle sizes match mean equatorial diameter (radius & volume toggles use the same sphere model).
Jupiter
Gas giant
- Diameter
- 142,984 km
- Radius
- 71,492 km
- Volume (sphere)
- 1.53 × 10¹⁵ km³
- Mass
- 317.8 M⊕
- Surface gravity
- 24.79 m/s²
- Mean distance from Sun
- 5.203 AU
Earth
Terrestrial
- Diameter
- 12,756 km
- Radius
- 6,378 km
- Volume (sphere)
- 1.09 trillion km³
- Mass
- 1.000 M⊕
- Surface gravity
- 9.81 m/s²
- Mean distance from Sun
- 1 AU
Diameter ratio (Jupiter / Earth)
0.000 : 1
You could line up about 11 Earths across Jupiter’s equator (by mean diameter).
Planet sizes ranked (quick guide)
Ordered by mean equatorial diameter (largest first). These one-liners are for orientation—see the table below for full numbers.
- 1.♃ JupiterLargest diameter in the solar system.
- 2.♄ SaturnSlightly smaller than Jupiter; famous rings (not drawn here).
- 3.♅ UranusIce giant; very tilted spin in real life.
- 4.♆ NeptuneIce giant; similar width to Uranus.
- 5.🌍 EarthOur reference for diameters and masses.
- 6.♀ VenusNearly Earth-sized; thick atmosphere.
- 7.♂ MarsAbout half of Earth’s width; rocky.
- 8.☿ MercurySmallest planet; rocky, Sun-hugging.
- 9.♇ PlutoDwarf planet; much smaller than Earth’s Moon.
Comparison table (all worlds)
| World | Type | Diameter | Radius | Volume (sphere) | Mass | Gravity | Sun (AU) |
|---|---|---|---|---|---|---|---|
| ☿ Mercury | Terrestrial | 4,879 km | 2,440 km | 60.81 billion km³ | 0.055 M⊕ | 3.7 | 0.387 |
| ♀ Venus | Terrestrial | 12,104 km | 6,052 km | 928.51 billion km³ | 0.815 M⊕ | 8.87 | 0.723 |
| 🌍 Earth | Terrestrial | 12,756 km | 6,378 km | 1.09 trillion km³ | 1.000 M⊕ | 9.81 | 1 |
| ♂ Mars | Terrestrial | 6,792 km | 3,396 km | 164.06 billion km³ | 0.107 M⊕ | 3.71 | 1.524 |
| ♃ Jupiter | Gas giant | 142,984 km | 71,492 km | 1.53 × 10¹⁵ km³ | 317.8 M⊕ | 24.79 | 5.203 |
| ♄ Saturn | Gas giant | 120,536 km | 60,268 km | 916.96 trillion km³ | 95.20 M⊕ | 10.44 | 9.537 |
| ♅ Uranus | Ice giant | 51,118 km | 25,559 km | 69.94 trillion km³ | 14.50 M⊕ | 8.69 | 19.191 |
| ♆ Neptune | Ice giant | 49,528 km | 24,764 km | 63.61 trillion km³ | 17.10 M⊕ | 11.15 | 30.069 |
| ♇ Pluto | Dwarf planet | 2,377 km | 1,188 km | 7.03 billion km³ | 0.003 M⊕ | 0.62 | 39.482 |
Mass = Earth masses (M⊕). Gravity = approximate surface m/s².
Jupiter vs Earth — scale in plain language
Jupiter’s mean equatorial diameter is a little over eleven times Earth’s, but volume scales with the cube of diameter for similar shapes—so Jupiter could hold on the order of 1,300 Earths by volume in a simple sphere model (our rounded diameters give about 1,408× Earth’s volume).
Mass is different again: Jupiter is roughly 317.8 Earth masses—still enormous, but not as extreme as the volume ratio because the gas giant is much less dense than rock and iron.
Want orbit distance instead of globe size? Use the Planet Distance Converter.
Quick answers (long-tail)
- How many Earths fit inside Jupiter? By volume (sphere model), roughly 1,408 Earths—because width goes ~11× but volume goes ~11³.
- Closest planet to Earth in size? Venus is closest in diameter; Mars is about half Earth’s width.
- Uranus vs Neptune size? Similar diameters in many tables; Neptune is denser and more massive even when widths are close.
- Pluto vs the Moon? Pluto (~2,380 km wide) is smaller than Earth’s Moon (~3,470 km).
Explore every planet + Pluto
Bars scale to Jupiter’s mean diameter. Click a row for Planet A, Shift+click for Planet B—or use the buttons. Hover for a quick stat preview.
Orbits: Planet Distance Converter.
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Frequently Asked Questions
What does this planet size comparison show?
Mean equatorial diameters in kilometers and miles, diameter ratios versus Earth, and approximate volume ratios (diameter cubed vs Earth) for Mercury through Pluto. It compares how wide each world is—not how far it orbits from the Sun.
Is planet size the same as distance from the Sun?
No. Orbital distance (semi-major axis) is how far a planet’s path sits from the Sun in AU or km. Physical size is the planet’s own diameter. Our Planet Distance Converter handles orbits; this page handles globe size.
Why are gas giant diameters “approximate”?
Jupiter, Saturn, Uranus, and Neptune are oblate (wider at the equator) and lack a sharp solid surface. Published “diameters” are reference values (often 1-bar atmosphere or mean spherical equivalents) suitable for classroom comparison—not millimeter-precise geodesy.
How do you get “volume vs Earth”?
We assume each body is a sphere with the listed mean equatorial diameter, so volume scales as diameter cubed. That is a geometry teaching shortcut—real interiors, compression, and shape differ, especially for small worlds like Pluto.
Can I share a comparison between two planets?
Yes. The URL updates with your two selections (and you can use Swap). Copy the link from your browser or use the copy-summary control on the page to grab text plus the shareable URL.
How many Earths fit inside Jupiter by volume?
Using a simple sphere model with mean equatorial diameters, Jupiter’s volume is on the order of 1,300–1,400 Earth volumes (because volume scales with diameter cubed and Jupiter is about 11× wider than Earth). The exact headline number depends slightly on which reference diameters you use—this page shows the ratio from our rounded fact-sheet values.
Which planet is closest in size to Earth?
Venus is closest in diameter—only slightly smaller than Earth. Mars is about half of Earth’s width. Mercury is smaller still. For a quick side-by-side, pick Earth and Venus in the selectors above.
Why is Uranus sometimes listed as bigger in diameter than Neptune?
Mean equatorial diameter references can differ slightly between sources and update as measurements improve; Uranus and Neptune are very close in size. Mass is a different story—Neptune is denser and more massive than Uranus even when diameters are similar.
Is Pluto smaller than Earth’s Moon?
Yes—Pluto’s mean diameter is roughly 2,380 km while the Moon is about 3,470 km across, so the Moon is noticeably wider. Pluto is still a fascinating dwarf planet for comparisons; use the table on this page to see both in context with the classical planets.