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The deepest part of the ocean, the Challenger Deep, is about 35,876 feet down. That's roughly three times the ocean's average depth of 12,080 feet, NOAA says.

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The deepest part of the ocean, the Challenger Deep, is about 35,876 feet down. That's roughly three times the ocean's average depth of 12,080 feet, NOAA says.ILLUSTRATION · AI

The Challenger Deep, the deepest part of the ocean, is approximately 35,876 feet deep, NOAA says.

The Challenger Deep lies beneath the western Pacific Ocean at the southern end of the Mariana Trench, several hundred kilometers southwest of Guam. It is approximately 10,935 meters (35,876 feet) deep.

By comparison, the average depth of the ocean is about 3,682 meters (12,080 feet). The Challenger Deep takes its name from HMS Challenger, whose crew first sounded the trench in 1875.

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