The Five Oceans Ranked from Largest to Smallest

Earth's single global ocean is conventionally divided into five named basins, ordered here by surface area:

1. Pacific Ocean – 165.25 million km² (46% of Earth's water surface; > all land combined).
2. Atlantic Ocean – 106.46 million km² (23%).
3. Indian Ocean – 70.56 million km² (20%).
4. Southern (Antarctic) Ocean – 20.33 million km² (5.4%); recognized by IHO (2000) as waters south of 60°S.
5. Arctic Ocean – 14.06 million km² (3.7%); smallest, shallowest, mostly ice-covered.

Quick Comparison

Together, they cover 71% of the planet and hold 97% of its water.