The calculated distance (air line) between Manresa and Caldes de Montbui is approximately 19 miles respectively 30 kilometers.
By car or train, the actual journey to Caldes de Montbui is certainly longer, as only the direct route (as the crow flies) between Manresa and Caldes de Montbui has been calculated here.
Air line (approximately)
30 kilometers
16 nautical miles