The calculated distance (air line) between Sar-e Pul and Qal‘ah-ye Shahr is approximately 50 miles respectively 81 kilometers.
By car or train, the actual journey to Qal‘ah-ye Shahr is certainly longer, as only the direct route (as the crow flies) between Sar-e Pul and Qal‘ah-ye Shahr has been calculated here.
Air line (approximately)
81 kilometers
44 nautical miles