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. Amortizing Loan Calculator Enter your desired payment – and let us calculate your loan amount. The tutorial shows how to build an amortization schedule in Excel to detail periodic payments on an amortizing loan or mortgage.