The calculated distance (air line) between Purfleet-on-Thames and Chadwell Heath is approximately 8 miles respectively 12 kilometers.
By car or train, the actual journey to Chadwell Heath is certainly longer, as only the direct route (as the crow flies) between Purfleet-on-Thames and Chadwell Heath has been calculated here.
Air line (approximately)
12 kilometers
7 nautical miles