I need an application that can calculate distance between uk postcodes(full postcode) that can be integrated with excel. Ideally it would be road distance as we need it to work out transport cost. In the best case scenario it would use google maps so that the client can also see the route( but this is not essential) the distance calculated will then have to be integrated with excel. I have software that convert spreadsheets into webpages , which allows me to do all the calculations and client input live on the website. In order to add the transport cost, I need something that can calculate the distance so that it can be multiplied by the appropriate rate. A excel formule that does the distance calculation will be fine and if connected to a map a bonus but not essential.