Santilab USPS Rate Calculator - Version 1.0 Although one can find comprehensive shipping information on USPS website, with USPS Rate Calculator and a minimum of programming you can bring that information to your website and retain your customer’s focus on the purchase.The component provides easy access to USPS services, including domestic rates, online tracking. All you’d need to do in order to deploy that functionality on your website is provide the required configuration data.For more information visit our website www.santilab.com