Nevada is about 396 times bigger than Singapore.

Singapore is approximately 719 sq km, while Nevada is approximately 284,448 sq km, making Nevada 39,451% larger than Singapore. Meanwhile, the population of Singapore is ~5.9 million people (3.2 million fewer people live in Nevada).
Tip: This to-scale comparison of Singapore vs. Nevada uses the Mercator projection, which distorts the size of regions near the poles.