The calculated distance (air line) between Banatski Karlovac and Požarevac is approximately 31 miles respectively 50 kilometers.
By car or train, the actual journey to Požarevac is certainly longer, as only the direct route (as the crow flies) between Banatski Karlovac and Požarevac has been calculated here.
Air line (approximately)
50 kilometers
27 nautical miles