Estimate only. Lenders set their own limits, usually 80 to 85 percent combined loan-to-value, and may charge fees. This is not financial advice.
How to use this calculator
Enter the current value of your home, the balance left on your mortgage and the maximum loan-to-value your lender allows. Press Calculate to see your equity and how much you could borrow with a home equity loan or HELOC.
The formula
Equity = home value − mortgage balance
Loan-to-value = mortgage balance ÷ home value
Available to borrow = home value × maximum LTV − mortgage balance
Example: A $500,000 home with a $300,000 mortgage has $200,000 of equity (40%). At an 80% limit, you could borrow up to $100,000.
Understanding your home equity numbers
This calculator shows how much of your home you own outright, your current loan-to-value ratio and an estimate of how much a lender might let you borrow. Each number answers a slightly different question, so it helps to read them together.
What each result means
- Home equity: The dollar value of your ownership. It grows as you pay down the loan and as the home’s value rises.
- Equity percentage: Your equity as a share of the home’s value. Lenders often look at this when deciding on refinancing or removing mortgage insurance.
- Loan-to-value (LTV): Your mortgage balance divided by the home’s value. Lower is better for lenders.
- Available to borrow: A rough ceiling for a home equity loan or HELOC, based on the maximum LTV you enter.
A real-world example
Say your home is worth $400,000 and you owe $250,000. Your equity is $150,000, or 37.5% of the home’s value, and your LTV is 62.5%. If a lender allows 85% combined LTV, the maximum total debt is $340,000. Subtract your $250,000 balance and you could borrow up to about $90,000. At an 80% limit, that drops to $70,000.
Main factors that change your equity
- Home value: The number you enter is the biggest variable. Online estimates can be off. A lender will order an appraisal.
- Loan balance: Use the payoff balance from your latest statement, and include any second mortgage or HELOC.
- Market changes: Equity can shrink if local prices fall, even while you keep paying the loan.
- Improvements: Some projects can raise value, but few return their full cost.
Common mistakes
- Using an optimistic home value. Try a conservative number to see a safer range.
- Forgetting closing costs. Home equity loans and HELOCs may have fees that reduce what you actually receive.
- Treating “available to borrow” as approval. Lenders also check credit, income and debt-to-income ratio.
Planning advice
Borrowing against your home puts the home at risk if you cannot repay. Use equity for goals that hold value, such as needed repairs, and compare the cost against other options. This calculator is for education only. Talk with a qualified financial advisor or lender before taking on new debt.

