What is the distance below sea level of a point on earth's surface?

The distance below sea level of a point on Earth's surface is measured as the depth relative to the average sea level. This can vary significantly depending on the location; for example, the Challenger Deep in the Mariana Trench is approximately 10,994 meters (about 36,070 feet) below sea level, making it the deepest known point in the Earth's oceans. Conversely, areas like the Dead Sea are also notable for being over 430 meters (1,411 feet) below sea level, marking the lowest land elevation on Earth.