City size comparison

compared to

Rio De Janeiro is about 10 times bigger than Boston.

Boston is approximately 124 sq km, while Rio De Janeiro is approximately 1,221 sq km, making Rio De Janeiro 885% larger than Boston.
Tip: This to-scale comparison of Boston vs. Rio De Janeiro uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Rio De Janeiro vs. Boston
Flip Comparison · See true size
See Rio De Janeiro on top of Boston
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Cost of Living Comparison · 7 categories - 2026 data
Boston is 3.0 times more expensive than Rio De Janeiro
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