Duct fittings Surface Area Calculator is a very useful App for mechanical engineers, site supervisors, store keepers… as fact when the ducts are delivered to any construction site the fabricated ducts & fittings surface area will be attached to the delivery note, therefore the storekeeper, site supervisor, or the engineer have to re-check the surface area again to verify the delivery for payment issues…. Our App Duct fitting Surface area Calculator will be very useful in this case… Our App is designed by mechanical engineers with collaboration with duct manufacturers. Finally enjoy using our Apps and in case of any quarries please contact us.