The calculated distance (air line) between Nové Mesto nad Váhom and Trnava is approximately 29 miles respectively 46 kilometers.
By car or train, the actual journey to Trnava is certainly longer, as only the direct route (as the crow flies) between Nové Mesto nad Váhom and Trnava has been calculated here.
Air line (approximately)
46 kilometers
25 nautical miles