Kauai is about 1.3 times smaller than Lake Okeechobee.

Lake Okeechobee is approximately 1,890 km² (730 sq mi), while Kauai is approximately 1,435 km² (554 sq mi), making Kauai 75.93% the size of Lake Okeechobee.
Tip: This to-scale comparison of Lake Okeechobee vs. Kauai uses the Mercator projection, which distorts the size of regions near the poles.
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