Download a Loan Amortization Table spreadsheet for Excel to create your own amortization schedule, table, or calculator. Free amortization spreadsheet.Free template with formulas. To use our amortization calculator, type in a dollar figure under "Loan amount. The tutorial shows how to build an amortization schedule in Excel to detail periodic payments on an amortizing loan or mortgage. This document provides instructions for creating a mortgage payment calculator in Excel that includes a data table and amortization schedule. This spreadsheet creates an amortization schedule for a fixed-rate loan, with optional extra payments.