Finance & Investment
Mortgage Refinance Calculator
Mortgage Refinance Calculator is a browser-based calculator tool on CalcToolsBase. Compare your current loan with a refinance to see monthly savings and the break-even point. To use it, enter your values and view the result directly in your browser — no signup and nothing to install.
Mortgage Refinance Calculator turns your current loan balance, current interest rate, remaining years and new interest rate into a clear figure with the supporting breakdown using standard financial formulas. The maths runs locally, so nothing you enter leaves the page.
About this calculator
With the Mortgage Refinance Calculator you can run the numbers on a money decision in a few seconds. Supply your current loan balance, current interest rate, remaining years and new interest rate and read a clear figure with the supporting breakdown, computed via standard financial formulas. The tool is free, runs locally, and keeps every value on your machine.
It compares monthly payments; total interest also depends on the remaining versus new term. Closing costs are entered as the refinancing fees.
How to use
- Enter your current loan balance and interest rate.
- Enter the remaining years on your current loan.
- Enter the new rate, new term, and refinancing fees.
- Press Calculate to see savings and break-even.
Why use Mortgage Refinance Calculator
Fast
Calculations run in your browser. No round trip to a server.
Private
Your inputs never leave your device. Nothing is uploaded.
Free
No signup, no paywall, no ads-in-results, no watermarks.
Educational
Uses simplified financial formulas for educational estimates. Results may not include fees, taxes, insurance, lender rules, penalties, or credit decisions.
Mobile-ready
Optimised for phones, tablets, and desktops alike.
Transparent
Clear about the method used and its limits, with disclaimers where they matter.
Common uses
Mortgage Refinance when weighing a refinance
Mortgage Refinance when reviewing an existing loan
Mortgage Refinance for switching to a lower rate
Mortgage Refinance for shortening the loan tenure
Mortgage Refinance when rates have dropped
Mortgage Refinance when comparing lenders' offers
Technical notes
Mortgage Refinance Calculator compares your current loan's EMI and total interest against a new rate and term, and uses the fee you enter to work out the break-even months; charges and taxes you don't enter are excluded.
Only the fee you enter is counted, for the break-even months; other lender charges and taxes are not included.
Results are rounded for display; the underlying calculation keeps full precision.
FAQ
How is refinancing benefit calculated?
It compares your current monthly payment with the new one, shows the monthly saving, and divides the fees by that saving to find the break-even month.
Does refinancing include closing costs?
Yes — enter them as the refinancing fees. Break-even tells you how many months of savings it takes to recover those costs.
Can the old and new terms differ?
Yes. The tool computes each payment on its own term, so you can compare keeping your remaining years against a fresh term.
Does the Mortgage Refinance Calculator send my data to a server?
No. The Mortgage Refinance Calculator runs entirely in your browser — your inputs never leave your device, and nothing is uploaded or stored.
Worked example
Refinancing a 250,000 balance from 8% to 6.5% (20 years) cuts the EMI from 2,091.1 to 1,863.93 — saving about 227.17/month before fees.