Home Equity Loan Calculator: Estimate Payments

A free home equity loan calculator estimates your fixed monthly payment and total interest from the amount borrowed, APR, and repayment term. Enter the loan figures offered or quoted by a lender to see the result; this estimate does not calculate how much equity you can borrow.

Formula

The calculator uses the standard amortizing-loan payment formula. It converts the annual percentage rate to a monthly rate, then spreads repayment of principal and interest across the scheduled monthly payments.

• Monthly payment: M = P × r / [1 − (1 + r)⁻ⁿ]
• Total interest: I = M × n − P
• Monthly rate: r = APR / 1,200
• Number of payments: n = term in years × 12

P is the amount borrowed in dollars, APR is the annual percentage rate entered as a percentage, r is the monthly rate as a decimal, n is the number of monthly payments, M is the monthly payment in dollars, and I is total interest in dollars. The formula assumes an equal payment each month and a fixed rate. The calculator’s displayed payment is rounded to cents; total interest uses that displayed payment multiplied by the number of payments, less the principal.

Worked Example

Using the calculator’s defaults—$20,000 borrowed, 8% APR, and a five-year term:

1. Convert the APR to a monthly rate: 8 ÷ 1,200 = 0.0066667.
2. Convert the term to payments: 5 × 12 = 60.
3. Apply the payment formula: $20,000 × 0.0066667 ÷ [1 − (1.0066667)⁻⁶⁰] = approximately $405.53 per month.
4. Calculate total interest using the rounded payment: $405.53 × 60 − $20,000 = $4,331.80.

For these inputs, the estimated monthly payment is $405.53 and total interest is $4,331.80. The last payment on a real loan can differ slightly because lenders may use their own rounding and payment-processing conventions.

Assumptions

• The interest rate stays fixed for the entire term.
• Payments are equal monthly payments, made at the end of each monthly period.
• Interest compounds monthly at APR divided by 12.
• Fees, taxes, insurance, property costs, and any optional charges are not included.

How to Use a Home Equity Loan Calculator

A home equity loan generally provides a lump sum that is repaid over an agreed term. This calculator estimates the scheduled principal-and-interest payment for a loan with regular monthly payments. Enter the proposed loan amount, the APR supplied by the lender, and the term in years. Change one input at a time to see how the mathematical payment estimate changes.

Use the loan amount—not the home’s value or your total equity—as the principal input. If a lender provides an APR that includes certain finance charges, use the APR as quoted rather than substituting a separate advertised interest rate. If you have only a rate and do not know the APR, the calculator can still illustrate the payment using that rate, but it will not account for charges that could affect the APR or the loan’s actual cost.

Understanding the Results and Loan Costs

The monthly payment is a principal-and-interest estimate, not a complete household budget. It does not include costs that are separate from the loan payment, and it does not establish whether a borrower qualifies or what amount may be available. Get the actual loan amount, APR, term, payment schedule, and itemized charges from the lender’s documents before relying on any figures.

Total interest is the sum implied by making the same rounded monthly payment for every scheduled month, minus the original principal. It is not the total amount repaid: the estimated total of principal and interest is the loan amount plus the displayed total interest. For the example, that sum is $24,331.80. A shorter term generally means fewer scheduled payments, while a different loan amount or APR changes the payment calculation. These observations describe the formula, not a recommendation about which loan to select.

Comparisons are meaningful only when the inputs and assumptions match. A quote with a different term, rate structure, payment frequency, or fees cannot be compared solely by looking at its monthly payment. Ask for the full repayment schedule and relevant charges, and check whether the rate is fixed or can change. This calculator models only a fixed rate.

Common Mistakes and Limits

• Entering home value instead of principal: the loan amount is the sum borrowed, not the property’s market value or estimated equity.
• Mixing up APR and monthly rate: enter APR as an annual percentage, such as 8, not 0.08 or a monthly rate. The formula performs the conversion.
• Leaving costs out of a comparison: the calculator does not add lender charges, taxes, insurance, or other expenses to the payment or total interest.
• Treating an estimate as a payoff quote: exact balances can depend on payment dates, rounding, fees, and the lender’s servicing calculations.
• Assuming every home-equity product works this way: a credit line or variable-rate arrangement may have changing balances, rates, or payment rules and is not represented by this fixed-payment formula.

Very small differences between this estimate and a lender’s schedule can result from rounding, the first payment date, or the lender’s calculation method. The formula is useful for a consistent estimate, but it cannot reproduce terms that are not represented by its inputs.

Frequently Asked Questions

Is a home equity loan calculator free?
Yes. The calculator on this page is free to use and requires no account. It estimates payments from the amount, APR, and term you enter.

How do I calculate a home equity loan payment?
Convert the annual APR to a monthly rate by dividing it by 1,200, convert the term to months, and apply the fixed-payment formula shown above. This calculator does those steps and rounds the monthly result to cents.

Does the calculator tell me how much I can borrow?
No. It calculates a payment for a loan amount you supply. It does not assess property value, existing debts or liens, eligibility, or a lender’s borrowing limits.

Does the payment include taxes and insurance?
No. The result includes estimated principal and interest only. Check the lender’s figures and your separate property-related costs to understand the full cash outlay.

Can I use this for a home equity line of credit?
Not reliably. A line of credit can have a changing balance and may have variable rates or payment rules. This calculator assumes one lump-sum loan, fixed APR, and equal monthly payments.

Why does my lender’s payment differ?
The lender may use different rounding, payment dates, fees, or loan terms. Compare the calculator inputs with the official disclosure and repayment schedule rather than assuming either figure includes the same costs.

This result is an estimate; the lender’s disclosure gives the exact figures.

Related

• Equity Loan Calculator: Estimate Payments and Interest
• Equity Loan for First-Time Buyers: How It Works
• DCU Home Equity Loan Rates and Payment Calculator

in p | Loan amount | $ | 20000 | 1 | 100000000
in apr | Interest rate (APR) | % | 8 | 0.01 | 100
in yrs | Loan term | years | 5 | 0.0833 | 50
out pmt | Monthly payment | $ | p * (apr / 1200) / (1 - (1 + apr / 1200) ^ -(yrs * 12)) | 2
out int | Total interest | $ | pmt * yrs * 12 - p | 2