The calculated distance (air line) between Nay Pyi Taw and Hinthada is approximately 151 miles respectively 244 kilometers.
By car or train, the actual journey to Hinthada is certainly longer, as only the direct route (as the crow flies) between Nay Pyi Taw and Hinthada has been calculated here.
Air line (approximately)
244 kilometers
131 nautical miles