Rate calculators
The checker tells you whether a rate is good. These calculators tell you what it means for your budget: the payment, the interest, the penalty, the break-even. All of them run in your browser; nothing you type is sent anywhere.

- What does a rate difference cost?See what 0.25, 0.50 or 1.00 points costs over a mortgage term or a loan.
- Mortgage payment calculatorMonthly payment, interest over the term and the balance left at renewal.
- Stay or switch at renewal?Does a lower rate elsewhere beat your renewal offer once switching costs are counted?
- Prepayment penalty estimatorThree months' interest versus a simplified interest rate differential.
- APR with fees calculatorTurn a quoted rate plus up-front fees into the annual percentage rate you really pay.
- Blend-and-extend calculatorEstimate a blended mortgage rate when your lender combines your old and new rates.
- HELOC interest calculatorMonthly interest-only cost of a HELOC balance and what a prime change does to it.