Compare the monthly payment on an adjustable-rate mortgage against a fixed-rate loan by entering each rate. See how the initial payment and total interest differ before you commit.
ARMs usually start with a lower rate and payment, but the rate can rise after the fixed intro period. Compare both here and consider how long you plan to stay.
If you expect to move or refinance before the rate adjusts, the lower intro payment can save money. If you plan to stay long term, a fixed rate is more predictable.