Financial-Adjacent

Home Equity Loan Calculator

Work out the equity available to borrow against, and what the repayment on it would be.

  • Answers as you type
  • Every formula cited
  • Calculated in your browser
SettingsSettings for this calculationUS
Market
Imperial · sales tax
Current market value.

Use a realistic figure, not the optimistic one. The lender will instruct their own valuation and will lend against that — and a valuation below expectation is the most common reason an equity release comes up short.

What you still owe on the first charge.

The balance on the main mortgage, which sits ahead of this borrowing in priority. It is the figure that decides how much equity is left: the lender works to a combined loan-to-value across both charges, so overstating what you owe understates what you can borrow and understating it produces an offer that will not survive the valuation.

The total borrowing the lender allows against the value.

Combined loan-to-value counts the existing mortgage plus the new borrowing. 80-85% is typical; a lender offering more is usually pricing that risk into the rate.

Rate on the equity loan.

The rate on the second charge, which is normally higher than the first-charge mortgage rate — the lender is behind another lender in a sale and prices that. Do not copy the main mortgage's rate across. If the offer is a drawdown facility rather than a lump sum, the rate may apply only to what is drawn, and this calculation assumes the whole amount is outstanding from the start.

Repayment term.

The term of this loan, which is often shorter than the mortgage behind it and does not have to match it. A short term on a second charge raises the monthly payment sharply, and the two payments run together — the test that matters is both at once against income, not this one alone.

Equity available to borrow

$120,000

Medium confidence

Figures that depend on a rate wait for yours — this page does not assume one.

Total equity in the property
$180,000
Maximum total borrowing at the stated CLTV
$340,000
Current loan-to-value
55 %
Then change the inputs to see how far the answer moves.

Show calculation logic

How this was calculated

Formula source(s)

  • Combined loan-to-value limits of 80-85% are typical for home equity lending; the limit is a user input here because it varies by lender and market
  • Repayment uses the standard amortisation formula

Inputs used

Property value
400000
Outstanding mortgage
220000
Maximum combined LTV (%)
85
Interest rate (%)
Term (years)
15

Intermediate steps

Total equity in the property
$180,000
Maximum total borrowing at the stated CLTV
$340,000
Current loan-to-value
55 %
Final result$120,000

What this calculation does not cover

  • Total equity and borrowable equity are different figures — the lender's CLTV cap leaves a buffer you cannot access.
  • Affordability is assessed separately. Having the equity does not mean the income supports the payment.
  • The loan is secured on your home. Failure to keep up repayments puts the property at risk.

Computed in your browser — nothing you enter is uploaded. Presented in US customary units and US trade terminology. Where a formula follows a published standard, that standard and its edition are cited beside it on this page; where none governs, the page says so. Local amendments override model codes — verify against the code in force where you build.

Sources checked 2026-08-26 · in the site-wide review of 2026-09-06 · v1.0.0

Regulatory standards & verification citations2
  1. Combined loan-to-value limits of 80-85% are typical for home equity lending; the limit is a user input here because it varies by lender and market
  2. Repayment uses the standard amortisation formula
Cite this page

Your workspace

Most jobs need more than one number. Add the calculators you need next and they open right here, underneath this one — your figures stay on screen and nothing is lost to a page change.

Now that you have the number

These guides cover the work this quantity is for — the first ones run this calculator inside the section that raises the question.

How to calculate home equity loan in 6 steps

  1. Property valueCurrent market value.
  2. Outstanding mortgageWhat you still owe on the first charge.
  3. Maximum combined LTV (%)The total borrowing the lender allows against the value.
  4. Interest rate (%)Rate on the equity loan.
  5. Term (years)Repayment term.
  6. Equity available to borrowThe tool computes the equity available to borrow from those figures and shows the formula, its sources, and a confidence rating alongside it.

Equity available to borrow by property value

Page defaults, not your figures above.

Property valueEquity available to borrow (currency)
50,0000
100,0000
200,0000
500,000205,000
1,000,000630,000
2,000,0001,480,000

Frequently asked questions

Why can I not borrow all my equity?
Because the lender leaves a buffer against a fall in value. With 180,000 of equity and an 85% combined cap you might access 120,000 — the remaining 60,000 is the margin that keeps the loan secured if the market moves. That gap surprises people who have worked out their equity themselves.
Is this better than adding to the mortgage?
The rate on your existing mortgage decides it: on a good fixed rate a separate second-charge loan protects that rate, and on a poor one remortgaging the lot is usually cheaper. Further advancing on a good fixed rate may force the whole balance onto a worse rate. Compare the total cost of both, not the monthly payment.
Does a renovation add enough value to justify borrowing?
Sometimes, and far less often than people assume. Kitchens and bathrooms rarely return their full cost; adding floor area usually does better. This calculator tells you what is available, not whether spending it is sound — that is a different question and worth answering first.
What is the risk?
The loan is secured on your home. Unsecured borrowing at a higher rate risks your credit; secured borrowing at a lower rate risks the house. That difference is the entire reason the rate is lower, and it should be weighed rather than treated as a free saving.
Preliminary estimate, not certified engineering. This tool produces an indicative quantity calculation for planning purposes only — it is not a certified structural analysis, a guaranteed material takeoff, or a substitute for building department approval. Always verify measurements on-site and have a licensed contractor or structural engineer review any load-bearing, code-sensitive, or safety-critical work before purchasing materials or starting construction. Spotted an arithmetic or standards error? Report it to contact@craftquantities.com with your inputs — a confirmed fix gets a permanent check of its own, so the same mistake cannot come back.