The calculated distance (air line) between Addis Ababa and Debre Birhan is approximately 70 miles respectively 113 kilometers.
By car or train, the actual journey to Debre Birhan is certainly longer, as only the direct route (as the crow flies) between Addis Ababa and Debre Birhan has been calculated here.
Air line (approximately)
113 kilometers
61 nautical miles