Mekong
The Mekong is a river in Southeast Asia, originating on the Tibetan Plateau and flowing to the South China Sea.
Also known as: Mekong River
How big is it?
4,350 km long
Also 2,703 mi
Approximate main-channel length · approximate
Typical recorded range: 4,300 km to 4,400 km.
A little perspective
About the same scale as Callisto.
Callisto: Callisto is a natural satellite of Jupiter, with a heavily cratered icy surface.
Measurements, assumptions & sources +
Mekong
The Mekong is described by the cited source as approximately 4,350 km long from the Tibetan Plateau to its delta in the South China Sea. Headwater and channel-centreline conventions affect the total.
Encyclopaedia Britannica — Mekong River
The marked approximate main-channel length is calibrated. Unmeasured illustration details are representative.
Callisto
Rounded mean-radius model of Callisto. The derived area and volume describe a sphere; surface terrain and flattening are omitted.
NASA JPL — Planetary satellite physical parameters
The marked mean diameter is calibrated. Unmeasured illustration details are representative.
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Why this measurement?
Why we use 4,350 km
For comparison, this page uses approximate main-channel length. This is labelled approximate; the central value is useful for comparison, while real values or measurement solutions can vary. The recorded range is 4,300 km to 4,400 km.
The Mekong is described by the cited source as approximately 4,350 km long from the Tibetan Plateau to its delta in the South China Sea. Headwater and channel-centreline conventions affect the total.
The marked horizontal span follows the named feature; transparent margins and unmeasured details do not alter it. How calibrated comparisons work →
Recorded properties
Mekong dimensions and measurements
| Property | Selected value | Recorded range | Basis |
|---|---|---|---|
| 4,350 km | 4,300 km to 4,400 km | approximate |
Around this scale
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These links use compatible length records, ordered around the selected value.
Nearest lower value · PlacesMurray River2,530 kmThe Murray River is a major river in southeastern Australia, flowing from the Snowy Mountains to the Southern Ocean.Around the same scale · PlacesAmazon River6,400 kmThe Amazon River is a major waterway in South America that flows eastward across the continent and drains a vast rainforest basin.Nearest higher value · PlacesLena4,400 kmThe Lena is a major river in eastern Siberia, Russia, flowing from the Baikal Mountains to the Laptev Sea.Sources and method
Want to check the number?
The source records and measurement method remain available for inspection.
- Encyclopaedia Britannica — Mekong RiverApproximately 4,350 km under the cited source and channel convention.
There’s always another scale
Follow your curiosity.
PlacesAmazon River6,400 kmThe Amazon River is a major waterway in South America that flows eastward across the continent and drains a vast rainforest basin.PlacesMurray River2,530 kmThe Murray River is a major river in southeastern Australia, flowing from the Snowy Mountains to the Southern Ocean.
SpaceCallisto4,821 kmCallisto is a natural satellite of Jupiter, with a heavily cratered icy surface.
SpaceMercury4,879 kmMercury is a rocky planet orbiting closest to the Sun in the Solar System.
SpaceTitan5,150 kmTitan is a natural satellite of Saturn, with a thick nitrogen-rich atmosphere and surface lakes of hydrocarbons.
SpaceIo3,643 kmIo is a natural satellite of Jupiter, covered with active volcanoes and sulphur deposits.
SpaceGanymede5,262 kmGanymede is a natural satellite of Jupiter and contains a magnetic field generated by its partially liquid core.
SpaceMoon3,475 kmThe Moon is Earth’s natural satellite and the brightest large object in Earth’s night sky.