The calculated distance (air line) between Formigine and Calderara di Reno is approximately 21 miles respectively 34 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 Formigine and Calderara di Reno has been calculated here.
Air line (approximately)
34 kilometers
18 nautical miles