United States is about 23,868 times bigger than Heard Island and McDonald Islands.

Heard Island and McDonald Islands is approximately 412 sq km, while United States is approximately 9,833,517 sq km, making United States 2,386,676% larger than Heard Island and McDonald Islands.
Tip: This to-scale comparison of Heard Island and McDonald Islands vs. United States uses the Mercator projection, which distorts the size of regions near the poles.

Compare further: United States vs. Heard Island and McDonald Islands

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