The calculated distance (air line) between Niedernhausen and Steinbach am Taunus is approximately 11 miles respectively 18 kilometers.
By car or train, the actual journey to Steinbach am Taunus is certainly longer, as only the direct route (as the crow flies) between Niedernhausen and Steinbach am Taunus has been calculated here.
Air line (approximately)
18 kilometers
10 nautical miles