British Indian Ocean Territory is about 462 times smaller than Haiti.

Haiti is approximately 27,750 sq km, while British Indian Ocean Territory is approximately 60 sq km, making British Indian Ocean Territory 0.22% the size of Haiti. Meanwhile, the population of Haiti is ~11.9 million people (11.9 million fewer people live in British Indian Ocean Territory).
Tip: This to-scale comparison of Haiti vs. British Indian Ocean Territory uses the Mercator projection, which distorts the size of regions near the poles.
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