The calculated distance (air line) between Nürnberg and Heidenheim an der Brenz is approximately 68 miles respectively 110 kilometers.
By car or train, the actual journey to Heidenheim an der Brenz is certainly longer, as only the direct route (as the crow flies) between Nürnberg and Heidenheim an der Brenz has been calculated here.
Air line (approximately)
110 kilometers
59 nautical miles