Brazil is about 2.1 times smaller than South America.

South America is approximately 17,840,000 sq km, while Brazil is approximately 8,515,770 sq km, making Brazil 47.73% the size of South America.
Tip: This to-scale comparison of South America vs. Brazil uses the Mercator projection, which distorts the size of regions near the poles.
Our free app, MapSize by MyLifeElsewhere — compare any two places, to scale on your mobile device.