The largest ocean by surface area is the Pacific Ocean. Covering more than 63 million square miles (165 million square kilometers), it comprises more than 30% of the Earth's surface and is bigger than all of the Earth's landmasses combined. The Pacific Ocean is bounded by Asia and Australia to the west and North and South America to the east. It plays a crucial role in global weather patterns and marine biodiversity. The ocean's depth, diverse ecosystems, and importance in international trade make it a significant natural feature on the planet, influencing both climate and the economy.