The calculated distance (air line) between Nykøbing Sjælland and Frederiksberg is approximately 38 miles respectively 60 kilometers.
By car or train, the actual journey to Frederiksberg is certainly longer, as only the direct route (as the crow flies) between Nykøbing Sjælland and Frederiksberg has been calculated here.
Air line (approximately)
60 kilometers
33 nautical miles