Quick Facts
Since surveys use different criteria and techniques for identifying and measuring natural boundaries, recorded areas of land and sea are subject to variation. As a result, there are no universally agreed estimates for Earth data.
Key facts about planet Earth:
- Age: 4,500,000,000 years
- Total Surface Area: 509,600,000 sq km (197,000,000 sq miles)
- Land Surface Area: 148,000,000 sq km (57 000 000 sq miles) (29% of total area)
- Water Surface Area: 361,600,000 sq km (140,000,000 sq miles) (71% of total area)
- Mass: 6 x 1023 tonnes
- Circumference at Equator: 40,076 km (24,902 miles)
- Circumference of Meridian: 40,000 km (24,860 miles)