Water, Water Everywhere
Updated February 28, 2017 | Infoplease Staff
Do you know the percentage of the earth's surface covered by water?
About 70.8% of the Earth's surface is covered by water. Here's the breakdown on land and water versus total area.
- Total area: 510.072 million sq km (196.93 million sq mi.).
- Land area: 148.94 million sq km (57.50 sq mi.).
- Water area: 361.132 million sq km (139.43 sq mi.).
- Comparative area: land area about 15 times the size of the United States.
For further statistics, see our Profile of the World.