The calculated distance (air line) between Ashby-de-la-Zouch and Belper is approximately 19 miles respectively 31 kilometers.
By car or train, the actual journey to Belper is certainly longer, as only the direct route (as the crow flies) between Ashby-de-la-Zouch and Belper has been calculated here.
Air line (approximately)
31 kilometers
17 nautical miles