The calculated distance (air line) between Nāmagiripettai and Kallakurichi is approximately 51 miles respectively 81 kilometers.
By car or train, the actual journey to Kallakurichi is certainly longer, as only the direct route (as the crow flies) between Nāmagiripettai and Kallakurichi has been calculated here.
Air line (approximately)
81 kilometers
44 nautical miles