Pittsburgh is about 4.4 times smaller than Toronto.

Toronto is approximately 630 sq km, while Pittsburgh is approximately 143 sq km, making Pittsburgh 22.76% the size of Toronto.
Tip: This to-scale comparison of Toronto vs. Pittsburgh 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.