Based on its most distant outlet in the Pará estuary, which serves as an entry point for shipping, its length is approximately 4,200 miles [6,750 km].
Berdasarkan tempat terjauhnya sebelum memasuki laut di Muara Pará, yang berfungsi sebagai tempat masuknya barang - barang kiriman, panjang sungai itu hampir mencapai 6.750 kilometer.