Loan Amortization Schedule outlines the interest and principal payments owed on a mortgage, including the outstanding balance. This calculator will help you figure out your regular loan payments and it will also create a detailed schedule of payments.Create automatic loan amortization schedule table with PMT, IPMT, PPMT formulas in Microsoft Excel This Microsoft Excel template illustrates how to create a loan amortization schedule, as well as dealing with additional payments and variable interest rates. This loan amortization calculator figures your loan payment and interest costs at various payment intervals. Simply input the principal amount borrowed.