The calculated distance (air line) between Wuppertal and 's-Gravenzande is approximately 138 miles respectively 222 kilometers.
By car or train, the actual journey to 's-Gravenzande is certainly longer, as only the direct route (as the crow flies) between Wuppertal and 's-Gravenzande has been calculated here.
Air line (approximately)
222 kilometers
120 nautical miles