Pennsylvania is about 1,935 times bigger than British Indian Ocean Territory.

British Indian Ocean Territory is approximately 60 sq km, while Pennsylvania is approximately 116,075 sq km, making Pennsylvania 193,358% larger than British Indian Ocean Territory.
Tip: This to-scale comparison of British Indian Ocean Territory vs. Pennsylvania uses the Mercator projection, which distorts the size of regions near the poles.
Compare further: Pennsylvania vs. British Indian Ocean Territory