Calculate loans with amortization breakdown and printing. Simple to Use Windows Loan Calculator Software. You can now easily calculate your loans with a complete amortization breakdown. Enter your figures for loan amount, down payment, APR (Annual Percentage Rate), and payment cycles per year. Also has ability to calculate on a weekly basis, which is great for seeing just how much a "rent to own" product really cost. Once you have your figures correctly entered, software generates your table showing the amortization (with complete payments breakdown) for the life of your loan.