Maui is about 6 times smaller than Big Island of Hawaii.

Big Island of Hawaii is approximately 10,434 km² (4,029 sq mi), while Maui is approximately 1,883 km² (727 sq mi), making Maui 18.05% the size of Big Island of Hawaii.
Tip: This to-scale comparison of Big Island of Hawaii vs. Maui uses the Mercator projection, which distorts the size of regions near the poles.
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