Venus is very close in size to Earth, often called Earth's "sister planet" because of this similarity. Its diameter at the equator is about 7,521 miles (12,104 kilometers), which is roughly 95% of Earth's diameter of 7,926 miles (12,756 kilometers)
. In terms of radius, Venus has a mean radius of approximately 6,052 kilometers (3,760 miles)
. Its surface area is about 90% that of Earth, covering roughly 460 million square kilometers (178 million square miles)
. The volume of Venus is about 86% that of Earth, around 928 billion cubic kilometers (223 billion cubic miles)
. Venus's mass is about 81.5% of Earth's mass, at approximately 4.87 × 10^24 kilograms
. The planet is nearly spherical due to its very slow rotation, with a diameter only about 638 kilometers (397 miles) less than Earth's
. Overall, Venus is slightly smaller than Earth but still a substantial terrestrial planet with dimensions and mass close to our own planet.
