The calculated distance (air line) between Žarnovica and Spišská Nová Ves is approximately 90 miles respectively 145 kilometers.
By car or train, the actual journey to Spišská Nová Ves is certainly longer, as only the direct route (as the crow flies) between Žarnovica and Spišská Nová Ves has been calculated here.
Air line (approximately)
145 kilometers
78 nautical miles