What is a mortgage refinance calculator?

A tool that compares your current loan terms with a potential new loan to estimate monthly payment changes, total interest savings, and the break-even point where refinance costs are recovered.

How do I know if refinancing is worth it?

Compare the refinance closing costs against your monthly payment savings; the break-even month tells you how many months it takes to recoup the costs through lower payments.

Can I include cash-out or cash-in amounts in a refinance model?

Yes, some calculators let you enter cash received or paid at closing, which affects the new loan balance and total interest paid over time.

Does compounding frequency really change the refinance math?

Yes, especially if your current loan compounds monthly and the new loan compounds yearly or semi-annually; the difference can shift the total interest and payment amounts.

What should I enter for closing costs?

Enter the total lender fees, title insurance, appraisal, and any points you pay to lower the rate; these are the upfront costs the calculator uses to determine the break-even point.

Housing & Real Estate2 options compared

Mortgage Refinance Calculator

Compares current mortgage loan details with potential refinance options to model savings and adjust repayment scenarios. Users input key financial variables, such as existing loan amounts, interest rates, down payments, and desired new terms. The calculator processes this data to generate estimated figures for various outcomes, providing a clear side-by-side view of the financial differences...

Mortgage and real estate calculators

Editors’ Top PickBased on community votes

Financial Toolset

financialtoolset.com

Calculate your potential savings from refinancing with our free tool. See if now is the right time to refinance.

Open Financial Toolset Read review →

Other OptionsRanked by votes

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Omni Calculator
omnicalculator.com
Apply the mortgage refinance calculator to compare your current mortgage loan with a potential refinance option to se...
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Side by side

Mortgage Refinance Calculator options compared

Tool	Best for	Strengths	Limitations
Financial Toolset financialtoolset.com	Quick break-even estimate	Shows break-even month to the dollar Simple input fields for balance, rate, term, closing costs	Ads on the page No compounding frequency options
Omni Calculator omnicalculator.com	Detailed side-by-side table	Includes compounding frequency selections Outputs total interest and total payments difference Supports cash-in/cash-out scenarios	More fields to fill out No explicit break-even month mentioned in excerpt

Buyer's guide

How to choose a mortgage refinance calculator

When you want a fast yes/no answer on whether refinancing makes financial sense, focus on the break-even point and total lifetime savings. If you need to model compounding frequency, cash-out options, or compare multiple rate/term combos in one table, Omni Calculator gives you more controls. Otherwise, FinancialToolset gets you in and out with minimal data entry.

Questions

Mortgage Refinance Calculator FAQ

What is a mortgage refinance calculator?: A tool that compares your current loan terms with a potential new loan to estimate monthly payment changes, total interest savings, and the break-even point where refinance costs are recovered.
How do I know if refinancing is worth it?: Compare the refinance closing costs against your monthly payment savings; the break-even month tells you how many months it takes to recoup the costs through lower payments.
Can I include cash-out or cash-in amounts in a refinance model?: Yes, some calculators let you enter cash received or paid at closing, which affects the new loan balance and total interest paid over time.
Does compounding frequency really change the refinance math?: Yes, especially if your current loan compounds monthly and the new loan compounds yearly or semi-annually; the difference can shift the total interest and payment amounts.
What should I enter for closing costs?: Enter the total lender fees, title insurance, appraisal, and any points you pay to lower the rate; these are the upfront costs the calculator uses to determine the break-even point.

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