The calculated distance (air line) between Neder-Hardinxveld and Zoetermeer is approximately 22 miles respectively 36 kilometers.
By car or train, the actual journey to Zoetermeer is certainly longer, as only the direct route (as the crow flies) between Neder-Hardinxveld and Zoetermeer has been calculated here.
Air line (approximately)
36 kilometers
19 nautical miles