The calculated distance (air line) between Neder-Hardinxveld and The Hague is approximately 29 miles respectively 47 kilometers.
By car or train, the actual journey to The Hague is certainly longer, as only the direct route (as the crow flies) between Neder-Hardinxveld and The Hague has been calculated here.
Air line (approximately)
47 kilometers
25 nautical miles