The calculated distance (air line) between Grodzisk Mazowiecki and Śródmieście is approximately 18 miles respectively 30 kilometers.
By car or train, the actual journey to Śródmieście is certainly longer, as only the direct route (as the crow flies) between Grodzisk Mazowiecki and Śródmieście has been calculated here.
Air line (approximately)
30 kilometers
16 nautical miles