The calculated distance (air line) between Stoke-on-Trent and Hemel Hempstead is approximately 113 miles respectively 182 kilometers.
By car or train, the actual journey to Hemel Hempstead is certainly longer, as only the direct route (as the crow flies) between Stoke-on-Trent and Hemel Hempstead has been calculated here.
Air line (approximately)
182 kilometers
98 nautical miles