Amsterdam is about 9 times smaller than Sao Paulo.

Sao Paulo is approximately 1,523 sq km, while Amsterdam is approximately 166 sq km, making Amsterdam 10.88% the size of Sao Paulo.
Tip: This to-scale comparison of Sao Paulo vs. Amsterdam 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.