The calculated distance (air line) between Spiesen-Elversberg and Karlsruhe is approximately 61 miles respectively 99 kilometers.
By car or train, the actual journey to Karlsruhe is certainly longer, as only the direct route (as the crow flies) between Spiesen-Elversberg and Karlsruhe has been calculated here.
Air line (approximately)
99 kilometers
53 nautical miles