The calculated distance (air line) between Essen and Mechelen-aan-de-Maas is approximately 66 miles respectively 107 kilometers.
By car or train, the actual journey to Mechelen-aan-de-Maas is certainly longer, as only the direct route (as the crow flies) between Essen and Mechelen-aan-de-Maas has been calculated here.
Air line (approximately)
107 kilometers
58 nautical miles