The calculated distance (air line) between Sha Tau Kok and Kwai Chung is approximately 13 miles respectively 22 kilometers.
By car or train, the actual journey to Kwai Chung is certainly longer, as only the direct route (as the crow flies) between Sha Tau Kok and Kwai Chung has been calculated here.
Air line (approximately)
22 kilometers
12 nautical miles