The calculated distance (air line) between Žarnovica and Nové Zámky is approximately 43 miles respectively 69 kilometers.
By car or train, the actual journey to Nové Zámky is certainly longer, as only the direct route (as the crow flies) between Žarnovica and Nové Zámky has been calculated here.
Air line (approximately)
69 kilometers
37 nautical miles