Nevada is about 1.3 times bigger than Utah.

Utah is approximately 212,751 sq km, while Nevada is approximately 284,448 sq km, making Nevada 34% larger than Utah. Meanwhile, the population of Utah is ~2.8 million people (63,334 fewer people live in Nevada).
Tip: This to-scale comparison of Utah vs. Nevada uses the Mercator projection, which distorts the size of regions near the poles.