The calculated distance (air line) between Gurun and Bukit Mertajam is approximately 31 miles respectively 51 kilometers.
By car or train, the actual journey to Bukit Mertajam is certainly longer, as only the direct route (as the crow flies) between Gurun and Bukit Mertajam has been calculated here.
Air line (approximately)
51 kilometers
27 nautical miles