The calculated distance (air line) between Kepala Batas and Bukit Mertajam is approximately 11 miles respectively 18 kilometers.
By car or train, the actual journey to Bukit Mertajam is certainly longer, as only the direct route (as the crow flies) between Kepala Batas and Bukit Mertajam has been calculated here.
Air line (approximately)
18 kilometers
10 nautical miles