The calculated distance (air line) between Naberezhnyye Chelny and Mamadysh is approximately 39 miles respectively 63 kilometers.
By car or train, the actual journey to Mamadysh is certainly longer, as only the direct route (as the crow flies) between Naberezhnyye Chelny and Mamadysh has been calculated here.
Air line (approximately)
63 kilometers
34 nautical miles