How to use the Mortgage Refinance Calculator
Fill in the fields on the left. Results, charts and the breakdown update instantly as you type or move a slider. Pick your country at the top of the page to switch currency.
Formula
Frequently asked questions
When is refinancing worth it?
Usually when you'll stay in the home longer than the break-even period and the new loan lowers your total cost, not just your payment.
Does a longer new term cost more?
Often yes. Restarting at 30 years lowers the payment but can add interest overall — compare lifetime cost too.
Cite or link to this calculator
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CalcKite. (2026). Mortgage Refinance Calculator [Online calculator]. https://www.calckite.com/refinance-calculator/
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Results are estimates for information only and are not financial, tax or legal advice. Tax rules, interest rates and fees change, so confirm important numbers with your bank, employer or a qualified adviser. Read our disclaimer.