Radius:
- Mercury's radius is approximately 2,440 kilometers (1,516 miles).
- Earth's radius is about 6,378 kilometers (3,963 miles).
Diameter:
- Mercury's diameter is roughly 4,880 kilometers (3,032 miles).
- Earth's diameter measures around 12,756 kilometers (7,926 miles).
Therefore, Earth's diameter is approximately 2.6 times larger than Mercury's diameter, and Earth's volume is roughly 18 times greater than Mercury's volume. In other words, Mercury is only about 38% the size of Earth.
