Challenger Deep
Challenger Deep is the deepest known point in the Earth's oceans, located in the Mariana Trench.
How big is it?
10.94 km depth
Also 6.795 mi
Depth · approximate
A little perspective
About the same scale as Deimos.
Deimos: Deimos is the smaller and outermost natural satellite of Mars, with an irregular, rocky shape.
Measurements, assumptions & sources +
Challenger Deep
About 10,935 m below the ocean surface in the Mariana Trench. Depth estimates vary by survey. The line shows depth, not the trench’s width.
The marked depth is calibrated. Unmeasured illustration details are representative.
Deimos
Mars’s smaller moon is irregular, roughly 15 × 12 × 11 km. The 12.4 km diameter is a representative comparison span rather than a hard spherical edge.
The marked representative mean diameter is calibrated. Unmeasured illustration details are representative.
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Why this measurement?
Why we use 10.94 km
For comparison, this page uses depth. This is labelled approximate; the central value is useful for comparison, while real values or measurement solutions can vary.
About 10,935 m below the ocean surface in the Mariana Trench. Depth estimates vary by survey. The line shows depth, not the trench’s width.
The marked horizontal span follows the named feature; transparent margins and unmeasured details do not alter it. How calibrated comparisons work →
Recorded properties
Challenger Deep dimensions and measurements
| Property | Selected value | Recorded range | Basis |
|---|---|---|---|
| 10.94 km | Not recorded | approximate |
Around this scale
Go smaller. Go bigger.
These links use compatible length records, ordered around the selected value.
Nearest lower value · PlacesMount Everest8.849 kmMount Everest is the highest mountain above sea level, located in the Himalayas on the border between Nepal and China.
Around the same scale · Places100 km² island10 kmAn island is a landmass entirely surrounded by water.
Nearest higher value · SpaceDeimos12.4 kmDeimos is the smaller and outermost natural satellite of Mars, with an irregular, rocky shape.Sources and method
Want to check the number?
The source records and measurement method remain available for inspection.
- NOAA — How deep is the ocean?Challenger Deep about 10,935 m; different surveys and methods give slightly different depths.
More ways to see it
Curated comparisons
There’s always another scale
Follow your curiosity.
PlacesMount Everest8.849 kmMount Everest is the highest mountain above sea level, located in the Himalayas on the border between Nepal and China.
SpaceEarth12,740 kmEarth is the rocky planet on which we live and the third planet from the Sun.
PlacesEarth’s oceans1.338 × 10⁹ km³Earth’s oceans are the interconnected bodies of salt water that cover most of the planet’s surface.SpaceDeimos12.4 kmDeimos is the smaller and outermost natural satellite of Mars, with an irregular, rocky shape.Places100 km² island100 km²An island is a landmass entirely surrounded by water.PeopleOne-hour cycle20 kmA one-hour cycle is the distance covered by cycling at a constant speed for one hour without stopping.
SpaceNeutron star20 kmA neutron star is the dense remnant core left after a massive star explodes as a supernova, composed mostly of neutrons.
SpacePhobos22.53 kmPhobos is the larger and innermost moon of Mars, notable for its irregular shape and heavily cratered surface.