Home Equity Calculator

A home equity calculator estimates how much you can borrow against the equity you've built up in your house. Equity is simply the home's current market value minus what you still owe on your mortgage. Lenders cap how much of that equity you can tap based on a combined loan-to-value (CLTV) ratio, typically 80–85%.

Home equity can be accessed as a home equity loan (lump sum, fixed rate), a HELOC (revolving line, usually variable rate), or a cash-out refinance (replacing your existing mortgage). Because the loan is secured by your home, rates are lower than unsecured borrowing — but missed payments can lead to foreclosure.

Suppose your home is worth $400,000, you owe $250,000 on the mortgage, and the lender's max CLTV is 80%:

• Total equity: $400,000 − $250,000 = $150,000 (37.5%)
• Max combined debt allowed: $400,000 × 80% = $320,000
• Maximum new borrowing: $320,000 − $250,000 = $70,000

If the lender allowed 85% CLTV instead, you could borrow up to $90,000. Push the home value up by $50,000 (an appraisal review or market growth) and the borrowing capacity at 80% jumps to $110,000.

• Major home improvements — kitchen remodel, addition, or roof replacement, where the project also adds resale value.
• Debt consolidation — replacing high-interest credit-card debt at a much lower rate (with caution: now your house is collateral).
• Funding a child's tuition — comparing this rate against private student loans.
• Bridge financing for a second home — covering a down payment until the existing home sells.
• Emergency cash reserve — opening a HELOC while you have strong income, even if you don't draw on it immediately.

• Using equity for consumables. Vacations, weddings, and depreciating purchases turn your home into collateral for things that vanish.
• Ignoring HELOC variable rate risk. HELOC rates often track the prime rate; a 2–3 point hike materially raises the payment.
• Overestimating the home's value. Use comparable recent sales or a real appraisal — not the highest Zestimate-style number.
• Forgetting closing costs. Home equity products often have 2–5% in closing costs, sometimes waived in exchange for prepayment penalties.
• Overlapping debt-to-income limits. Even if equity allows the borrowing, lenders also check your DTI; high existing debt may shrink the offer.