A home equity loan calculator takes the guesswork out of borrowing a lump sum against your house. Enter your home's value, your remaining mortgage balance, and a lender's maximum loan-to-value limit, and the tool tells you exactly how much you could qualify for β plus the fixed monthly payment you'd owe for the life of the loan.
Our team at Arb Digital builds websites and calculators like this one for lenders and financial services clients all the time, and we kept hearing the same question from homeowners: "how much could I actually borrow, and what would the payment be?" This free tool answers both in one step, with no signup and no sales call required.
What This Home Equity Loan Calculator Does
This calculator estimates your maximum available home equity loan based on your home's current value, what you still owe on your first mortgage, and the maximum loan-to-value ratio a lender will allow. It then runs a standard amortization calculation to show you the fixed monthly payment, the total interest you'd pay over the full term, and your resulting loan-to-value ratio once the new loan is added.
Unlike a HELOC, which is a revolving line of credit with a variable rate, a home equity loan is a second mortgage: a single lump-sum disbursement, a fixed interest rate, and a fixed monthly payment for a set number of years. That predictability is exactly why many borrowers choose it over a HELOC when they know the exact amount they need up front, such as for a debt consolidation payoff or a defined renovation budget.
How to Use It
- Enter your home's current value. Use a recent appraisal, a reliable online estimate, or a comparative market analysis. This figure drives every other calculation, so use your most accurate number.
- Enter your remaining mortgage balance. This is your current payoff amount, not your original loan balance β check your latest statement.
- Set the maximum LTV. Most home equity lenders cap combined debt at 80% to 90% of home value. The 85% default is a common benchmark, but confirm your lender's actual limit.
- Enter the loan interest rate. Home equity loan rates are fixed at origination. Use a real quote if you have one, or the illustrative default to explore the math.
- Choose your loan term. Terms typically range from 5 to 30 years. Shorter terms carry higher payments but less total interest.
- Click Calculate. You'll instantly see your available loan amount, monthly payment, total interest, and your new LTV.
The Formula / How It's Calculated
The available loan amount uses the same logic lenders apply during underwriting. They take your home's appraised value, multiply it by the maximum LTV percentage they allow, and subtract your existing mortgage balance. What remains is the maximum new loan they'll approve: Available Loan = (Home Value Γ Max LTV%) β Mortgage Balance. With our default figures β a $500,000 home, an 85% max LTV, and a $250,000 mortgage balance β that comes out to $175,000 in available equity to borrow against.
The monthly payment then uses the standard fixed-rate amortization formula: M = P Γ [r(1+r)^n] / [(1+r)^n β 1], where P is the loan principal, r is the monthly interest rate (annual rate divided by 12), and n is the total number of monthly payments (term in years times 12). This is the same formula used for standard mortgages, so if you've ever seen a mortgage amortization schedule, the shape of a home equity loan payment will look familiar. For consumer-friendly guidance on how home equity loans work and what to compare between lenders, see the Consumer Financial Protection Bureau's guide.
Home Equity Loan vs. HELOC vs. Cash-Out Refinance
These three products all let you tap home equity, but they work very differently. A home equity loan gives you a lump sum with a fixed rate and fixed payment β simple, predictable, and ideal when you know the exact amount you need. A HELOC gives you a revolving credit line with a variable rate, letting you draw funds as needed and pay interest only on what you use, which suits ongoing or staged expenses better. A cash-out refinance replaces your entire first mortgage with a new, larger one and gives you the difference in cash, which can make sense if current mortgage rates are lower than your existing rate, but it resets your entire mortgage term and closing costs are typically higher.
Choosing between them usually comes down to how you plan to use the money and how much rate certainty you want. If you already have a low first-mortgage rate, a home equity loan or HELOC as a second lien preserves that rate instead of replacing it, which is often the smarter move compared to a full refinance.
Why the Loan Term You Choose Matters So Much
The term length you select has an outsized effect on both your monthly budget and your lifetime cost. A 10-year term on a $175,000 loan at 7.5% produces a noticeably higher monthly payment than a 30-year term on the same amount, but the total interest paid over the life of the loan can be dramatically lower β often tens of thousands of dollars less. Run the calculator above with a few different term lengths side by side before deciding, since the "right" answer depends entirely on whether your priority is a lower monthly payment or the lowest total cost of borrowing.
It's also worth checking whether your lender allows extra principal payments without a prepayment penalty. If you can comfortably afford a higher payment some months, paying down principal ahead of schedule on a longer-term loan can shrink your total interest bill close to what a shorter term would have cost, while keeping the lower required payment as a safety net.
What Lenders Look at Beyond Your LTV
Loan-to-value is the headline number, but it's far from the only thing underwriters review. Debt-to-income ratio (DTI) β your total monthly debt payments divided by your gross monthly income β often matters just as much. Even if your home value and equity check every box, a lender may still cap your approved amount, or decline the application outright, if adding the new payment would push your DTI above their threshold, typically somewhere around 43% to 50% depending on the lender and loan program.
Credit score plays a similar role. Two borrowers with identical home values and identical requested loan amounts can be offered very different interest rates purely based on credit history, since a home equity loan's fixed rate is priced to reflect the lender's risk. Employment stability, existing liens on the property, and even the property type (primary residence versus second home versus investment property) can all shift both your approved amount and your rate. Because of this, the number this calculator returns is a ceiling based on equity alone β your actual approved amount may be lower once income and credit are factored in, so treat this as a starting point for the conversation with a lender, not a guaranteed offer.
How a Home Equity Loan Shows Up on Your Property Title
Once funded, a home equity loan is recorded as a second mortgage lien against your property, sitting behind your first mortgage in priority. This has a few practical implications. If you decide to sell the home, both the first mortgage and the home equity loan must be paid off from the sale proceeds before you receive any remaining equity in cash. If you want to refinance your first mortgage down the road, the home equity lender may need to sign a subordination agreement allowing the new first mortgage to keep its senior position β a step that can add time and paperwork to a refinance. None of this is a reason to avoid a home equity loan, but it's worth knowing so nothing catches you off guard later.
If flexibility matters more than a fixed payment, compare this result against our HELOC calculator before you apply. Arb Digital also builds fast, high-converting websites and content for lenders and financial services brands β see all of our free tools below.
Try the HELOC Calculator All Free ToolsCommon Mistakes to Avoid
- Borrowing the maximum available just because you qualify. A bigger loan means a bigger fixed payment for years β borrow only what you actually need.
- Overlooking closing costs. Home equity loans often carry appraisal, origination, and title fees that add to your effective cost β ask for a full breakdown up front.
- Choosing the longest term without checking total interest. A lower payment can quietly cost thousands more over the life of the loan.
- Forgetting this is a second lien on your home. Missed payments put your house at risk just as much as missing your first mortgage payment.
- Not comparing at least three lenders. Rates and max LTV limits vary significantly between banks, credit unions, and online lenders.
Related Free Tools From Arb Digital
Continue planning with the HELOC Calculator for a flexible revolving-credit alternative, the LTV Calculator to check any loan-to-value ratio, the PMI Calculator for buyers putting down less than 20%, and the Mortgage Refinance Calculator or House Affordability Calculator for the bigger picture. Browse our full free online tools hub for more.
Frequently Asked Questions
Most lenders allow you to borrow up to 80β90% of your home's value, minus your existing mortgage balance. Use the calculator above with your lender's actual max LTV for a precise estimate.
Yes, home equity loans typically carry a fixed interest rate and a fixed monthly payment for the entire term, unlike the variable rate common on HELOCs.
It uses a standard amortization formula based on the loan amount, interest rate, and term length, the same math used to calculate a regular mortgage payment.
Yes, many borrowers use home equity loans to pay off higher-interest credit cards or personal loans, since home equity rates are usually lower. Just remember the loan becomes secured by your house.
Requirements vary by lender, but many look for a credit score of 620 or higher, with the best rates typically reserved for scores above 700.
No, it's a separate second mortgage secured by the same property. Your first mortgage terms and payment stay unchanged.
This tool provides general estimates for educational purposes only and is not financial, tax, legal, or medical advice. Figures are illustrative; consult a licensed professional for decisions.
