The calculated distance (air line) between Decima and Calderara di Reno is approximately 10 miles respectively 17 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 Decima and Calderara di Reno has been calculated here.
Air line (approximately)
17 kilometers
9 nautical miles