The calculated distance (air line) between Kowloon and Cheung Sha Wan is approximately 13 miles respectively 21 kilometers.
By car or train, the actual journey to Cheung Sha Wan is certainly longer, as only the direct route (as the crow flies) between Kowloon and Cheung Sha Wan has been calculated here.
Air line (approximately)
21 kilometers
11 nautical miles