Mammoth Cave National Park is about 44,989 times smaller than United States.

United States is approximately 9,833,517 sq km, while Mammoth Cave National Park is approximately 219 km² (84 sq mi), making Mammoth Cave National Park 0.0% the size of United States.
Tip: This to-scale comparison of United States vs. Mammoth Cave National Park uses the Mercator projection, which distorts the size of regions near the poles.

Compare further: Mammoth Cave National Park vs. United States

Our free app, MapSize by MyLifeElsewhere — compare any two places, to scale on your mobile device.