The calculated distance (air line) between Sprockhövel and Castrop-Rauxel is approximately 15 miles respectively 24 kilometers.
By car or train, the actual journey to Castrop-Rauxel is certainly longer, as only the direct route (as the crow flies) between Sprockhövel and Castrop-Rauxel has been calculated here.
Air line (approximately)
24 kilometers
13 nautical miles