Boston is about 1.3 times bigger than Rochester.

Rochester is approximately 93 sq km, while Boston is approximately 124 sq km, making Boston 34% larger than Rochester.
Tip: This to-scale comparison of Rochester vs. Boston 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.