The calculated distance (air line) between Nakhon Nayok and Ratchaburi is approximately 104 miles respectively 168 kilometers.
By car or train, the actual journey to Ratchaburi is certainly longer, as only the direct route (as the crow flies) between Nakhon Nayok and Ratchaburi has been calculated here.
Air line (approximately)
168 kilometers
91 nautical miles