The calculated distance (air line) between Herrsching am Ammersee and Karlsruhe is approximately 145 miles respectively 233 kilometers.
By car or train, the actual journey to Karlsruhe is certainly longer, as only the direct route (as the crow flies) between Herrsching am Ammersee and Karlsruhe has been calculated here.
Air line (approximately)
233 kilometers
126 nautical miles