The calculated distance (air line) between Roßlau and Gräfenhainichen is approximately 14 miles respectively 23 kilometers.
By car or train, the actual journey to Gräfenhainichen is certainly longer, as only the direct route (as the crow flies) between Roßlau and Gräfenhainichen has been calculated here.
Air line (approximately)
23 kilometers
12 nautical miles