The calculated distance (air line) between Giengen an der Brenz and Nürnberg is approximately 69 miles respectively 111 kilometers.
By car or train, the actual journey to Nürnberg is certainly longer, as only the direct route (as the crow flies) between Giengen an der Brenz and Nürnberg has been calculated here.
Air line (approximately)
111 kilometers
60 nautical miles