The calculated distance (air line) between Berkel en Rodenrijs and Amersfoort is approximately 40 miles respectively 65 kilometers.
By car or train, the actual journey to Amersfoort is certainly longer, as only the direct route (as the crow flies) between Berkel en Rodenrijs and Amersfoort has been calculated here.
Air line (approximately)
65 kilometers
35 nautical miles