The calculated distance (air line) between Āstāneh-ye Ashrafīyeh and Rūdsar is approximately 21 miles respectively 34 kilometers.
By car or train, the actual journey to Rūdsar is certainly longer, as only the direct route (as the crow flies) between Āstāneh-ye Ashrafīyeh and Rūdsar has been calculated here.
Air line (approximately)
34 kilometers
18 nautical miles