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Use this mortgage calculator to estimate and analyze the adjustable rate of your mortgage (ARM).
An ARM (adjustable rate mortgage), is a mortgage on which the interest rate is not fixed for the entire life of the mortgage loan. The rate is fixed for a period at the beginning (initial rate period), but after that it may change based on movements in an interest rate index. ARMs are different than fixed-rate mortgages (FRMs) where the mortgage rate holds for the entire life of the mortgage loan.