What does the HELOC Calculator estimate?

It estimates your available home equity line of credit (home value × max LTV − mortgage balance), the interest-only payment on what you draw, and an optional amortized payment if you enter a repayment term.

How does the HELOC Calculator figure out my credit limit?

It multiplies your home value by the maximum combined loan-to-value your lender allows, then subtracts your current mortgage balance. The default max LTV is 85%, but you can change it to match a specific lender's offer.

What is the difference between the interest-only and amortized payment in this calculator?

The interest-only payment (common during a HELOC's draw period) charges interest on the drawn balance only. The amortized payment, shown once you enter a repayment term, includes principal so the balance is paid off by the end of that term.

Is the HELOC Calculator's result the actual credit limit a lender will offer?

No — it's an estimate only, not financial advice. Real HELOC offers depend on your credit score, income, property type, and the lender's underwriting, so confirm actual terms directly with a lender.

Does the HELOC Calculator upload my home value or mortgage balance?

No. The HELOC Calculator runs entirely in your browser. The figures you enter stay on your device and are never uploaded to ArrayKit.

Can I see a full repayment schedule for the HELOC?

Yes. Once you enter a draw amount and repayment term, the calculator shows a month-by-month schedule of interest, principal, and remaining balance, with the first rows visible and a total count.

HELOC Calculator Online

Estimate a home equity line of credit limit and interest-only or amortized payments in your browser. Estimates only — not financial advice.

The HELOC Calculator runs entirely in your browser. Your home value, mortgage balance, and draw amount never leave your device and are not uploaded to ArrayKit. Results are estimates only, not financial advice.

Open the Home Equity Loan Calculator

About HELOC Calculator

HELOC Calculator estimates how much you could borrow against your home's equity and what the payments would look like. Enter your home's value, current mortgage balance, and the lender's maximum combined loan-to-value to see your available credit line. Add a draw amount and interest rate to see the interest-only payment lenders typically charge during the draw period, or add a repayment term to see the amortized principal-and-interest payment once the line converts to repayment. It's useful when you're comparing a HELOC against a home equity loan, planning a renovation budget, or checking whether a lender's quote looks reasonable. Everything computes locally as you type, and figures never leave your device. These are estimates only — not financial advice; confirm real terms with your lender.

Features

Estimates available HELOC credit from home value, mortgage balance, and max LTV
Defaults to an 85% combined loan-to-value cap, adjustable to match your lender
Calculates the interest-only monthly payment during the draw period
Optionally calculates the amortized payment once a repayment term is entered
Shows total interest and total paid over the repayment term
Full month-by-month repayment schedule, capped for readability
Copy a plain-text summary of every result with one click
Runs entirely in your browser with no figures sent anywhere

How to use the HELOC Calculator

Enter your home's current value and outstanding mortgage balance
Set the maximum combined loan-to-value your lender allows (default 85%)
Enter a draw amount and interest rate to see the interest-only payment
Optionally add a repayment term in months to see the amortized payment and schedule

Example

Input

$500k home, $300k owed, 85% LTV

Output

Available credit: $125,000

Common errors & troubleshooting

Available credit shows $0 even though the home has equity. — Check that the max LTV percentage matches your lender's actual cap — a low LTV (or a mortgage balance close to the home value) can push available credit to zero.
Interest-only payment looks too small. — The interest-only payment is based only on the amount drawn, not the full credit line. Increase the draw amount to see the payment on a larger balance.
Entering the rate as a decimal (0.08) instead of a percentage (8) gives a payment near zero. — Enter the annual rate as a whole percentage, e.g. 8 for 8% APR, not 0.08.
The amortized payment section doesn't appear. — The amortized payment only shows once you enter both a draw amount greater than 0 and a repayment term in months.

Frequently asked questions

What does the HELOC Calculator estimate?: It estimates your available home equity line of credit (home value × max LTV − mortgage balance), the interest-only payment on what you draw, and an optional amortized payment if you enter a repayment term.
How does the HELOC Calculator figure out my credit limit?: It multiplies your home value by the maximum combined loan-to-value your lender allows, then subtracts your current mortgage balance. The default max LTV is 85%, but you can change it to match a specific lender's offer.
What is the difference between the interest-only and amortized payment in this calculator?: The interest-only payment (common during a HELOC's draw period) charges interest on the drawn balance only. The amortized payment, shown once you enter a repayment term, includes principal so the balance is paid off by the end of that term.
Is the HELOC Calculator's result the actual credit limit a lender will offer?: No — it's an estimate only, not financial advice. Real HELOC offers depend on your credit score, income, property type, and the lender's underwriting, so confirm actual terms directly with a lender.
Does the HELOC Calculator upload my home value or mortgage balance?: No. The HELOC Calculator runs entirely in your browser. The figures you enter stay on your device and are never uploaded to ArrayKit.
Can I see a full repayment schedule for the HELOC?: Yes. Once you enter a draw amount and repayment term, the calculator shows a month-by-month schedule of interest, principal, and remaining balance, with the first rows visible and a total count.

Related tools

Home Equity Loan Calculator — Estimate how much you can borrow against home equity and the monthly payment.
Mortgage Calculator — Estimate monthly mortgage payments including principal, interest, taxes and insurance.
Loan Calculator — Calculate the monthly payment, total interest and payoff of any amortized loan.
Refinance Calculator — Compare your current mortgage to a refinance and find the break-even point.
Debt Consolidation Calculator — Compare multiple debts to a single consolidation loan and see the savings.
Amortization Calculator — Build a full loan amortization schedule showing principal and interest for each payment.