The calculated distance (air line) between Modena and Calderara di Reno is approximately 18 miles respectively 29 kilometers.
By car or train, the actual journey to Calderara di Reno is certainly longer, as only the direct route (as the crow flies) between Modena and Calderara di Reno has been calculated here.
Air line (approximately)
29 kilometers
16 nautical miles