California is about 1.7 times bigger than Uganda.

Uganda is approximately 241,038 sq km, while California is approximately 403,882 sq km, making California 68% larger than Uganda. Meanwhile, the population of Uganda is ~46.2 million people (9.0 million fewer people live in California).
Tip: This to-scale comparison of Uganda vs. California uses the Mercator projection, which distorts the size of regions near the poles.