Buffalo is about 1.6 times smaller than Amsterdam.

Amsterdam is approximately 166 sq km, while Buffalo is approximately 105 sq km, making Buffalo 63.09% the size of Amsterdam.
Tip: This to-scale comparison of Amsterdam vs. Buffalo 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.