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. The tutorial shows how to build an amortization schedule in Excel to detail periodic payments on an amortizing loan or mortgage. A biweekly amortization schedule is a table that details your loan payments every two weeks instead of the traditional monthly payment schedule. This calculator will help you compare the costs of a loan with a biweekly payment schedule and a loan with a monthly payment schedule.