size of earth
The Earth is about 12,742 kilometers in diameter on average, with a circumference of about 40,075 kilometers at the equator.
Quick Scoop: Size of Earth
Core stats (the essentials)
- Mean diameter: about 12,742 km (7,918 miles).
- Equatorial diameter: about 12,756 km (7,926 miles) – slightly wider at the equator.
- Polar diameter: about 12,714–12,725 km (≈7,906–7,907 miles) – slightly shorter pole to pole.
- Equatorial circumference: about 40,075 km (24,901 miles).
- Polar circumference: about 40,008 km (24,860 miles).
Earth is not a perfect sphere; it’s an oblate spheroid, a bit squashed at the poles and bulging at the equator due to its rotation.
A bit more “how big is that really?”
- Surface area: roughly 510 million square kilometers (about 71% covered by water).
- Volume: about 1 trillion cubic kilometers, giving space for its layered interior (crust, mantle, outer core, inner core).
- Mass: about 5.97 × 10²⁴ kilograms, which sets the gravity you feel at the surface.
If you could walk non‑stop around the equator at 5 km/h, it would take you over 330 days to circle the planet once.
In the solar system lineup
Here’s how Earth’s diameter compares with some neighbors:
| Planet | Diameter (km) |
|---|---|
| Mercury | 4,879 | [3]
| Venus | 12,104 | [3]
| Earth | 12,742 | [7][3]
| Mars | 6,779 | [3]
| Jupiter | 139,820 | [3]
Information gathered from public forums or data available on the internet and portrayed here.