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Home Equity Calculator

Calculate your home's equity, loan-to-value (LTV) ratio, and how much you can potentially borrow.

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Most lenders allow you to borrow up to 80% to 85% of your home's value.

Total Home Equity

$0

The portion of the home's value you actually own outright.

Current LTV Ratio

0.00%

Loan-to-Value. Should ideally be under 80%.

Available to Borrow

$0

Estimated maximum additional borrowing power.

Understanding Home Equity

Home equity is simply the portion of your home's value that you actually own free and clear. It's calculated by taking the current market value of your property and subtracting any outstanding debts secured against it—primarily your mortgage, but also any second mortgages, HELOCs (Home Equity Lines of Credit), or other liens.

How Home Equity is Calculated

The mathematical formula for calculating home equity is straightforward:

Home Equity = Current Home Value - Outstanding Mortgage Balance - Other Property Debts

For example, if your home is currently worth $500,000, and you owe $300,000 on your primary mortgage, your total home equity is $200,000.

What is Loan-to-Value (LTV)?

The Loan-to-Value (LTV) ratio is a critical metric used by lenders to assess the risk of a loan. It represents the percentage of your home's value that is currently financed by debt.

LTV = (Total Outstanding Loans / Current Home Value) × 100

Using the previous example, a $300,000 loan on a $500,000 home results in an LTV of 60%. A lower LTV is better. Lenders generally consider an LTV of 80% or lower to be standard. If your LTV goes above 80% on a primary mortgage, you are typically required to pay Private Mortgage Insurance (PMI).

How Much Equity Can I Borrow?

Just because you have $200,000 in equity doesn't mean a lender will let you borrow the full amount. Lenders want to ensure there is a buffer—a margin of safety in case property values decline.

Therefore, most lenders cap total borrowing at a Maximum LTV. This cap is most commonly 80%, though some lenders will allow up to 85% or even 90% (often at higher interest rates or with stricter credit requirements).

The formula to determine how much *usable* equity you have is:

Available Borrowing Power = (Current Home Value × Max LTV Percentage) - Current Outstanding Debts

If your home is worth $500,000, and the lender's max LTV is 80%, the maximum total debt allowed on the property is $400,000. If you already owe $300,000, your available borrowing power is the remaining $100,000.

Ways to Access Your Equity

If you have substantial equity built up, there are a few primary ways to access that capital:

Building equity takes time, achieved both through paying down your mortgage principal and through natural appreciation in your local real estate market. Use our mortgage calculator to see how extra payments can accelerate your equity growth.

Frequently Asked Questions

How do you calculate home equity?

Home equity is calculated by subtracting your outstanding mortgage balance and any other liens on your property from the current market value of your home.

What is a good Loan-to-Value (LTV) ratio?

A good LTV ratio is typically 80% or lower. Lenders generally require an LTV of 80% to avoid private mortgage insurance (PMI) and to offer the best interest rates on loans.

How much home equity can I borrow?

Most lenders allow you to borrow up to 80% or sometimes 85% of your home's total value, minus your current mortgage balance. This limit ensures you retain a buffer of equity in the home to protect the lender if prices fall.

Does a home equity loan increase my mortgage?

No, a home equity loan is typically a second, separate mortgage. It does not replace or increase your primary mortgage unless you explicitly choose to do a cash-out refinance.

Why did my home equity decrease?

Your home equity can decrease if the market value of your home drops significantly in your area, or if you take out additional loans against the property like a HELOC which increases your total debt.

Data Sources & Methodology

Calculations use standard financial formulas. Results are estimates for educational purposes and should not be used as the sole basis for financial decisions.

Cite This Page

Westmount Fundamentals. "Home Equity Calculator." westmountfundamentals.com/home-equity-calculator, 2026.

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