Here is the list of free finance calculators to perform all type of financial calculations. The users can calculate mortgage, compound interest, simple interest rate, GST, VAT, percent change increase/decrease in dataset. 

Make sure to use specific calculator for specific calculations. It's important otherwise it won't work. For instance, to calculate simple interest rate don't use compound interest calculator rather choose simple interest calculator from the list. The financial data is processed according to the standards formulas that run at the backend after you insert data and click calculate. 

These financial calculators can be used free to commercial or personal uses. There's no fees to be paid of any sort. There's no downloading or installation of these free finance tools required. They operate in the browser.