The calculated distance (air line) between Batu Kurau and Sungai Petani is approximately 52 miles respectively 83 kilometers.
By car or train, the actual journey to Sungai Petani is certainly longer, as only the direct route (as the crow flies) between Batu Kurau and Sungai Petani has been calculated here.
Air line (approximately)
83 kilometers
45 nautical miles