The calculated distance (air line) between Kulebaki and Nizhniy Novgorod is approximately 85 miles respectively 137 kilometers.
By car or train, the actual journey to Nizhniy Novgorod is certainly longer, as only the direct route (as the crow flies) between Kulebaki and Nizhniy Novgorod has been calculated here.
Air line (approximately)
137 kilometers
74 nautical miles