This form allows you to see how prepaying your mortgage reduces the length of your mortgage by putting in the current values for your loan. If you know your current principal balance and principal/interest payment, enter then in fields A1 and A2. Otherwise enter the three values for your loan in B1, B2 and B3. (Original Loan Amount, Month of First Payment, Length of Loan).
The accuracy of this calculator and its applicability to your circumstances is not guaranteed. Results should be discussed with a qualified professional before any product purchases or loan commitments are made.