Hawaii is about 1.4 times smaller than New Hampshire.

New Hampshire is approximately 23,227 sq km, while Hawaii is approximately 16,635 sq km, making Hawaii 71.62% the size of New Hampshire. Meanwhile, the population of New Hampshire is ~1.3 million people (43,831 more people live in Hawaii).
Tip: This to-scale comparison of New Hampshire vs. Hawaii uses the Mercator projection, which distorts the size of regions near the poles.