The calculated distance (air line) between Hofgeismar and Mönchengladbach is approximately 129 miles respectively 207 kilometers.
By car or train, the actual journey to Mönchengladbach is certainly longer, as only the direct route (as the crow flies) between Hofgeismar and Mönchengladbach has been calculated here.
Air line (approximately)
207 kilometers
112 nautical miles