Rio De Janeiro is about 8 times bigger than Honolulu.

Honolulu is approximately 157 sq km, while Rio De Janeiro is approximately 1,221 sq km, making Rio De Janeiro 679% larger than Honolulu.
Tip: This to-scale comparison of Honolulu vs. Rio De Janeiro 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.