The calculated distance (air line) between Mattenbach (Kreis 7) and Zürich (Kreis 12) is approximately 10 miles respectively 16 kilometers.
By car or train, the actual journey to Zürich (Kreis 12) is certainly longer, as only the direct route (as the crow flies) between Mattenbach (Kreis 7) and Zürich (Kreis 12) has been calculated here.
Air line (approximately)
16 kilometers
9 nautical miles