Question: how deep is the bottom of the ocean

title: Mariana Trench
text: The Mariana Trench or Marianas Trench is the deepest part of the world 's oceans . It is located in the western Pacific Ocean , an average of 200 kilometres ( 124 mi ) to the east of the Mariana Islands , in the Western Pacific east of Philippines . It is a crescent - shaped scar in the Earth 's crust , and measures about 2,550 km ( 1,580 mi ) long and 69 km ( 43 mi ) wide on average . It reaches a maximum - known depth of 10,994 metres ( 36,070 ft ) ( ± 40 metres ( 130 ft ) ) at a small slot - shaped valley in its floor known as the Challenger Deep , at its southern end , although some unrepeated measurements place the deepest portion at 11,034 metres ( 36,201 ft ) . For comparison : if Mount Everest were dropped into the trench at this point , its peak would still be over 2 kilometres ( 1.2 mi ) underwater . In 2009 , the Marianas Trench was established as a United States National Monument . 

Answer: answer: The Mariana Trench is the deepest part of the world 's oceans . It reaches a maximum - known depth of 10,994 metres.