The calculated distance (air line) between Nyazepetrovsk and Chelyabinsk is approximately 95 miles respectively 152 kilometers.
By car or train, the actual journey to Chelyabinsk is certainly longer, as only the direct route (as the crow flies) between Nyazepetrovsk and Chelyabinsk has been calculated here.
Air line (approximately)
152 kilometers
82 nautical miles