Use these calculator templates to help you navigate your loans, budgets, net worth, and more. This calculator will help you figure out your regular loan payments and it will also create a detailed schedule of payments.Loan amortization schedule. 3. 4, Enter values, Loan summary. I'm looking for a Biweekly Loan Amortization Schedule that will allow me to input various additional payments depending on ability. This amortization calculator shows the schedule of paying extra principal on your mortgage over time. The tutorial shows how to build an amortization schedule in Excel to detail periodic payments on an amortizing loan or mortgage. This financial calculator helps you find out. View the report to see a complete amortization payment schedule, and how much you can save on your mortgage! Full usage instructions are in the tips tab below.