House Equity Calculator
See how much of your home you actually own, how close you are to lender comfort zones, and how much equity may be usable under a target LTV strategy.
Model your equity position
Adjust the three core variables and watch the finance cards update live.
This is the ownership value sitting above your remaining mortgage balance.
A simple cushion view showing how far you are from a fully financed position.
Lower is usually healthier for flexibility, refinance options, and future borrowing room.
Modeled against your chosen max LTV so you can test conservative vs aggressive lending assumptions.
What Is House Equity?
House equity is the part of the property value you actually own after subtracting your remaining mortgage balance. If the home is worth more than you owe, that gap is your equity. It matters because it shapes refinancing options, cash-out decisions, HELOC planning, and even how comfortably you can move or hold the property through changing market conditions.
The main mistake people make is treating total equity and usable equity as the same thing. They are related but not identical. Total equity is your ownership position. Usable or tappable equity is the portion that may still fit inside lender loan-to-value rules. A stronger calculator should show both so the page feels like a decision tool, not just a subtraction widget.
How to Calculate House Equity
The core formula is straightforward: equity = home value - mortgage balance. If your home is worth $500,000 and your mortgage balance is $320,000, your estimated equity is $180,000. The second useful formula is LTV = mortgage balance / home value. That percentage shows how much of the home is still financed instead of owned.
In borrowing scenarios, many lenders care about a maximum LTV target. That is where modeled borrowing room becomes useful. If you assume an 80% cap, then a rough planning version of tappable equity is home value × max LTV - mortgage balance. That gives a cleaner picture of what portion of your ownership stake may actually translate into a borrowing option.
The most reliable way to use this kind of page is to test multiple assumptions, not just one. Conservative homeowners often compare a lower estimated value with a more optimistic one, then watch how the equity and LTV cards move together. That helps separate genuine financing room from wishful pricing.
Worked Examples
A homeowner estimates the property value at $500,000 and owes $320,000. Their equity is $180,000 and their current LTV is 64.0%. With an 80% max LTV scenario, the modeled tappable equity becomes $80,000.
A second homeowner has a $450,000 home and a $375,000 mortgage. They still have positive equity, but the LTV is already 83.3%. Under an 80% assumption, usable borrowing room is effectively zero even though the ownership stake is still positive.