Heard Island and McDonald Islands is about 1,646 times smaller than Texas.

Texas is approximately 678,052 sq km, while Heard Island and McDonald Islands is approximately 412 sq km, making Heard Island and McDonald Islands 0.06% the size of Texas.
Tip: This to-scale comparison of Texas vs. Heard Island and McDonald Islands uses the Mercator projection, which distorts the size of regions near the poles.
Our free app, MapSize by MyLifeElsewhere — compare any two places, to scale on your mobile device.