Mortgage Calculators - Version 1.0.0 The Mortgage Calculator Collection is a pack of 7 mortgage calculators designed for the UK mortgage market which are free to use on your financial website. These home loan calculators are easy to set up and will blend in perfectly with your existing website theme. Webmasters can change the scripts appearance using CSS and the scripts internal HTML. The scripts are freeware, all we ask is that you retain the "Powered by" hyperlink to our website.