On of the best things about the internet is all the great tools available on line.  You no longer have to rely on your banker or broker to do mortgage pay down calculations.  You can find a family mortgage calculator on line that will do a complete amortization table for you as well as highlight the amount of interest you will pay.  A family mortgage calculator is great to help you budget for the future.

When you use a family mortgage calculator you can find determine how long it will take you to pay off your mortgage with different monthly payments.  The amortization table will clearly show both interest and principal portions with each payment as well as a balance owing column. 

Another great feature of a family mortgage calculator is that you can change the interest rate and it will recalculate the amortization table instantly.  You can run multiple scenarios and get results with a click of a mouse.  You can also track your payments monthly and watch the balance owing amount come down.  You can use it for other loans as well.