Home equity

HELOC Calculator

Estimate available home equity line of credit, combined LTV, and interest-only monthly payment.

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Free mortgage tool

Estimate a home equity line of credit before you borrow.

A HELOC calculator helps homeowners estimate how much credit may be available based on home value, mortgage balance, and a target maximum combined loan-to-value ratio. It also estimates an interest-only monthly payment for planning purposes.

A home equity line of credit is commonly used as flexible borrowing secured by home equity. Because borrowing against equity can affect risk and future flexibility, this calculator is designed for education and planning only.

Use this estimate with related tools such as the Loan-to-Value Calculator, Home Equity Loan Calculator, and Cash-Out Refinance Calculator before comparing options.

This calculator is for educational and planning purposes only. It is not financial advice, a loan approval, a tax bill, or a lender quote.

Calculator

Enter your numbers.

The estimate updates instantly in your browser as you adjust the inputs.

Available Credit$0
Interest-Only Payment-
Current LTV-
Combined LTV-

Your input is processed in your browser. Dicno Labs does not upload or store the data you enter in this tool.

Formula

How the calculation works

Available credit is estimated as home value multiplied by maximum combined LTV, minus the current mortgage balance. The monthly interest-only payment is estimated as available credit multiplied by the annual rate divided by 12.

Example calculation

For a $500,000 home with a $300,000 mortgage and an 80% combined LTV target, maximum secured debt is $400,000. Estimated available HELOC credit is $100,000. At 9%, the interest-only payment is about $750 per month.

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Related glossary terms

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HELOC Calculator FAQ

What does a HELOC calculator estimate?

HELOC Calculator is an educational planning tool. Use the result as a starting point, then compare it with written lender, servicer, tax, or closing documents when available.

What is combined LTV?

HELOC Calculator is an educational planning tool. Use the result as a starting point, then compare it with written lender, servicer, tax, or closing documents when available.

Does this estimate guarantee HELOC approval?

HELOC Calculator is an educational planning tool. Use the result as a starting point, then compare it with written lender, servicer, tax, or closing documents when available.

Is a HELOC payment interest-only?

HELOC Calculator is an educational planning tool. Use the result as a starting point, then compare it with written lender, servicer, tax, or closing documents when available.

Can a HELOC rate change?

HELOC Calculator is an educational planning tool. Use the result as a starting point, then compare it with written lender, servicer, tax, or closing documents when available.

How does a HELOC differ from a home equity loan?

HELOC Calculator is an educational planning tool. Use the result as a starting point, then compare it with written lender, servicer, tax, or closing documents when available.

Can I use a HELOC for closing costs?

HELOC Calculator is an educational planning tool. Use the result as a starting point, then compare it with written lender, servicer, tax, or closing documents when available.

Why does home value matter?

HELOC Calculator is an educational planning tool. Use the result as a starting point, then compare it with written lender, servicer, tax, or closing documents when available.

What if available credit is zero?

HELOC Calculator is an educational planning tool. Use the result as a starting point, then compare it with written lender, servicer, tax, or closing documents when available.

Is this financial advice?

HELOC Calculator is an educational planning tool. Use the result as a starting point, then compare it with written lender, servicer, tax, or closing documents when available.

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