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Real Estate

HELOC Calculator

How much home equity you can borrow.

Enter your values

Enter the home value in $.

Enter the mortgage balance in $.

Enter the max combined ltv in %.

Enter the heloc rate in %.

Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.

Results
Available credit line
$135,000.00
Current equity
$210,000.00
Interest-only payment
$956.25
10-year repayment payment
$1,673.81
Current LTV
58%

Quick answer

Most lenders let you borrow up to 80–85% of your home's value minus your mortgage balance.

Available = Value × LTV − Mortgage balance

At a glance

What it doesHow much home equity you can borrow.
CategoryReal Estate
Inputs neededHome value, Mortgage balance, Max combined LTV, HELOC rate
Main outputAvailable credit line
FormulaAvailable = Value × LTV − Mortgage balance
CostFree — no sign-up, no download

How to use the HELOC Calculator

  1. 1Enter your home's current value.
  2. 2Enter your remaining mortgage balance.
  3. 3Adjust the LTV cap your lender allows.

Inputs explained

Home value($)
Enter the home value in $.
Mortgage balance($)
Enter the mortgage balance in $.
Max combined LTV(%)
Enter the max combined ltv in %.
HELOC rate(%)
Enter the heloc rate in %.

Worked example

Using the values the calculator loads with:

Inputs

  • Home value500000 $
  • Mortgage balance290000 $
  • Max combined LTV85 %
  • HELOC rate8.5 %

Results

  • Available credit line$135,000.00
  • Current equity$210,000.00
  • Interest-only payment$956.25
  • 10-year repayment payment$1,673.81
  • Current LTV58%

Frequently asked questions

Are HELOC rates fixed?

Usually variable, tied to prime plus a margin.

Is HELOC interest deductible?

In the US, only when funds are used to buy, build or substantially improve the home.

What do I need to enter into the HELOC Calculator?

Just 4 values: home value, mortgage balance, max combined ltv, heloc rate. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.

How does the HELOC Calculator work out the answer?

Most lenders let you borrow up to 80–85% of your home's value minus your mortgage balance. It applies the formula Available = Value × LTV − Mortgage balance and shows the working so you can check each step by hand.

Is the HELOC Calculator free, and do I need an account?

It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.

Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.