Planets · #48 biggest of 1,014
How big is Io (moon)?
3,643 km
Io (moon) measures 3,643 km. That's about 412 Mount Everests lined up end to end.
By the numbers
- That's 3,643 km, or about 2,264 miles.
- It's about 2.14 million times taller than an average adult (1.7 m).
- Roughly 412 Mount Everests could line up across it.
- Walking nonstop, you'd need about 30 days to travel its length.
- Out of all 1,014 things in this collection, it ranks #48 by size.
Size comparison
How Io (moon) stacks up against things of a similar size. Tap any bar to explore it.
Mekong River
4,350 km
Mackenzie River
4,241 km
Niger River
4,200 km
Murray River
3,672 km
Io (moon)
3,643 km
Volga River
3,530 km
Moon
3,474.4 km
Madeira River
3,250 km
Indus River
3,180 km
Bars use a logarithmic scale so everything fits — real differences are even more extreme!
Fun fact
Standing beside it, an average person (1.7 m tall) would reach only about less than 0.001% of its height.
More in Planets
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