River Length Comparison (Kilometers)
Compare 14 river lengths, from 346 km Thames to 6650 km Nile. Standard geographic lists, sourced. The full table of river lengths is sourced below here.
Visual comparison
All values
Click any row to load it as Entry A.
| Name | Value | Context | Source |
|---|---|---|---|
| Thames 346 km. Shortest row here. | 346 kilometers | England river, London waterway | Britannica: Thames 346 km |
| Danube 2850 km. Eight Thames rivers. | 2,850 kilometers | Europe second river, ten nations | Britannica: Danube 2850 km |
| Mekong 4350 km. Fifteen hundred over Danube. | 4,350 kilometers | Southeast Asia lifeline | Britannica: Mekong 4350 km |
| Lena 4400 km. Fifty over Mekong. | 4,400 kilometers | Siberian arctic river | Britannica: Lena 4400 km |
| Amur 4444 km. Forty four over Lena. | 4,444 kilometers | Asia border river | Britannica: Amur 4444 km |
| Congo 4700 km. Deepest, noted. | 4,700 kilometers | Africa deep river | Britannica: Congo 4700 km |
| Parana 4880 km. Near two hundred over Congo. | 4,880 kilometers | South America southern giant | Britannica: Parana 4880 km |
| Ob 5410 km. Five hundred over Parana. | 5,410 kilometers | Siberian gulf river | Britannica: Ob 5410 km |
| Yellow (Huang He) 5464 km. Fifty four over Ob. | 5,464 kilometers | China yellow river | Britannica: Yellow River 5464 km |
| Yenisei 5539 km. Seventy five over Yellow. | 5,539 kilometers | Siberian north river | Britannica: Yenisei 5539 km |
| Mississippi system 6275 km. System total, noted. | 6,275 kilometers | North America system with Missouri | USGS: Mississippi-Missouri system 6275 km |
| Yangtze 6300 km. Twenty five over Mississippi. | 6,300 kilometers | China longest river | Britannica: Yangtze 6300 km |
| Amazon 6400 km. One hundred over Yangtze. | 6,400 kilometers | South America giant, discharge king | Britannica: Amazon 6400 km |
| Nile 6650 km. Longest row here. Two fifty over Amazon. | 6,650 kilometers | Africa longest, ranked first here | Britannica: Nile 6650 km |
About this converter
River lengths run 346 to 6650 km on standard geographic lists. The Thames runs 346, the Danube 2850, the Mekong 4350, the Lena 4400, the Amur 4444, the Congo 4700, the Parana 4880, the Ob 5410, the Yellow 5464, the Yenisei 5539, the Mississippi system 6275, the Yangtze 6300, the Amazon 6400 and the Nile 6650. That makes one Nile equal nineteen Thames rivers. Every figure here is the published mainstream length.
How to use it
Pick two entries and a unit in the top row. The three boxes below stay linked. Change any box and the other two update. Try 1 Nile against the Thames to see the near twenty to one gap.
Tributary counting shifts totals, so rows pin mainstream with the system noted. The Amazon versus Nile lead flips by survey and stays noted. Seasonal channels never change ranked lengths and stay out. Underground stretches stay out because surface water compares only. Dams slow mouths but never ranked lengths and stay out. Rapids never shortened runs and stay noted. Dams slow mouths but never ranked lengths and stay out.
FAQ
How long is the Nile?
6650 km on the standard list. Surveys flip it with the Amazon, noted.
How long is the Amazon?
6400 km. It discharges more than any river on Earth.
How long is the Thames?
346 km. Nineteen fit one Nile.
Do tributaries count?
Yes. Rows pin mainstream lengths with tributary systems noted per row.
Sources
- Britannica river lengths: Thames 346 km through Nile 6650 km
- USGS: Mississippi-Missouri system 6275 km
Last verified: 2026-09-30 · 14 entries
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