how long is the amazon river

The Amazon River is approximately 4,225 to 4,345 miles long (about 6,800 to 6,992 kilometers), based on recent research and measurements. However, there is some variation in reported lengths due to differing opinions on its exact source and mouth locations. Some studies place the length closer to 4,345 miles by including specific tributaries and measuring to a southern outlet of its estuary, which can make it the longest river in the world, slightly longer than the Nile River.