The calculated distance (air line) between Sentmenat and Caldes de Montbui is approximately 2 miles respectively 4 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 Sentmenat and Caldes de Montbui has been calculated here.
Air line (approximately)
4 kilometers
2 nautical miles