Pittsburgh is about 12 times smaller than Houston.

Houston is approximately 1,659 sq km, while Pittsburgh is approximately 143 sq km, making Pittsburgh 8.65% the size of Houston.
Tip: This to-scale comparison of Houston 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.