The calculated distance (air line) between Balassagyarmat and Parádsasvár is approximately 33 miles respectively 54 kilometers.
By car or train, the actual journey to Parádsasvár is certainly longer, as only the direct route (as the crow flies) between Balassagyarmat and Parádsasvár has been calculated here.
Air line (approximately)
54 kilometers
29 nautical miles