The calculated distance (air line) between Phetchaburi and Phra Pradaeng is approximately 55 miles respectively 88 kilometers.
By car or train, the actual journey to Phra Pradaeng is certainly longer, as only the direct route (as the crow flies) between Phetchaburi and Phra Pradaeng has been calculated here.
Air line (approximately)
88 kilometers
48 nautical miles