Lena
The Lena is a major river in eastern Siberia, Russia, flowing from the Baikal Mountains to the Laptev Sea.
Also known as: Lena River
How big is it?
4,400 km · approximate main-channel length
Also 2,734 mi
Approximate main-channel length · approximate
Typical recorded range: 4,350 km to 4,450 km.
A little perspective
Lena vs Callisto: length comparison
The mean diameter of Callisto is about 1.1 times the main-channel length of the Lena.
The Lena is a major river in eastern Siberia, Russia, flowing from the Baikal Mountains to the Laptev Sea.
Callisto is a natural satellite of Jupiter, with a heavily cratered icy surface.
Both rulers start at the same zero and share one linear scale. Artwork keeps its original proportions.
Measurements, assumptions & sources +
Lena
Approximate main-channel length: 4,400 km; approximate; range 4,350 km–4,450 km.
The Lena is approximately 4,400 km long from its Baikal Mountains headwaters to the Laptev Sea. Source selection and channel-centreline conventions affect the total.
Encyclopaedia Britannica — Lena River
The marked approximate main-channel length is calibrated. Unmeasured illustration details are representative.
Callisto
Mean diameter: 4,821 km; approximate.
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.
Use the visual comparison to explore its scale, then check the measurements and sources.
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Why this measurement?
Why we use 4,400 km
We compare the main-channel length of the Lena. This is an estimate; check the notes for its rounding and uncertainty. The recorded range is 4,350 km to 4,450 km.
The Lena is approximately 4,400 km long from its Baikal Mountains headwaters to the Laptev Sea. Source selection and channel-centreline conventions affect the total.
The marked horizontal span follows the measured feature, not the edges of the image. How calibrated comparisons work →
Recorded properties
Dimensions and measurements
| Property | Selected value | Recorded range | Basis |
|---|---|---|---|
| 4,400 km | 4,350 km to 4,450 km | approximate |
Around this scale
Explore nearby values.
Compare examples with lower, similar and higher values. Each card names the measurement being compared.
Nearest lower valuePlaces and natural featuresMekong4,350 kmApproximate main-channel lengthThe Mekong is a river in Southeast Asia, originating on the Tibetan Plateau and flowing to the South China Sea.Around the same scalePlaces and natural featuresYenisei5,539 kmApproximate river-system lengthThe Yenisei is a major river in Siberia, Russia, flowing northwards from Mongolia to the Arctic Ocean.Nearest higher valuePlaces and natural featuresOb–Irtysh system5,410 kmApproximate river-system lengthThe Ob–Irtysh system is a river network in western Siberia, Russia and Kazakhstan, formed by the Ob River and its main tributary, the Irtysh.Sources and method
Want to check the number?
The source records and measurement method remain available for inspection.
- Encyclopaedia Britannica — Lena RiverApproximately 4,400 km from headwaters near Lake Baikal to the Laptev Sea.
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Follow your curiosity.
PlacesYenisei5,539 kmThe Yenisei is a major river in Siberia, Russia, flowing northwards from Mongolia to the Arctic Ocean.PlacesOb–Irtysh system5,410 kmThe Ob–Irtysh system is a river network in western Siberia, Russia and Kazakhstan, formed by the Ob River and its main tributary, the Irtysh.
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.
SpaceGanymede5,262 kmGanymede is a natural satellite of Jupiter and contains a magnetic field generated by its partially liquid core.
SpaceIo3,643 kmIo is a natural satellite of Jupiter, covered with active volcanoes and sulphur deposits.
SpaceMoon3,475 kmThe Moon is Earth’s natural satellite and the brightest large object in Earth’s night sky.