Planets · #28 biggest of 1,014
How big is Mars?
6,779 km
Mars measures 6,779 km. That's about 766 Mount Everests lined up end to end.
By the numbers
- That's 6,779 km, or about 4,212 miles.
- It's about 3.99 million times taller than an average adult (1.7 m).
- Roughly 766 Mount Everests could line up across it.
- Walking nonstop, you'd need about 56 days to travel its length.
- Out of all 1,014 things in this collection, it ranks #28 by size.
Size comparison
How Mars stacks up against things of a similar size. Tap any bar to explore it.
Great Wall of China
21,196 km
white dwarf star
14,000 km
Earth
12,742 km
Venus
12,104 km
Mars
6,779 km
Nile River
6,650 km
Amazon River
6,400 km
Yangtze River
6,300 km
Mississippi River
6,275 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.
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