Last updated: October 15, 2026.
HomeEquityCalc is a free calculator and a small library of plain-language guides for homeowners who want to understand home equity before they talk to a lender. The calculator answers one practical question: given what my home is worth, what I still owe, and the combined loan-to-value (CLTV) limit a lender might use, roughly how large a home equity line of credit (HELOC) could I qualify for?
The site is operated by Numerlyn LLC, 30 N Gould St Ste N, Sheridan, WY 82801, USA. You can reach us by email at contactnumerlyn@gmail.com or by phone at 307.338.3959. Numerlyn LLC publishes educational calculators. We are not a bank, a lender, a mortgage broker, a loan servicer, a tax preparer, or a financial adviser, and we do not take loan applications.
The calculator multiplies your home value by a maximum CLTV percentage and subtracts the mortgage balance you enter. That is the whole formula, and it is published in full on our Methodology page so you can check any result by hand. Everything runs in your browser. There is no account, no sign-up and no email address required, and the numbers you type are not sent to us.
A real lender looks at much more than three numbers: your credit history, income, other debts, the property type, and an appraisal of the home. For that reason every result on this site is an educational estimate, not an offer, a pre-approval, or a guarantee.
Our guides explain how a HELOC works, how it compares with a cash-out refinance, how repayment changes after the draw period, and how the federal tax rules treat home equity interest. Where a guide states a rule or a program feature, we check it against a primary source such as the Consumer Financial Protection Bureau, the Federal Trade Commission, or the Internal Revenue Service, and we say which source and when we checked it. Where lender practices vary, we say so instead of presenting one number as if it were universal. Worked examples use round, made-up numbers so the arithmetic is easy to follow; they are not predictions or quotes.
Home equity products are easy to misunderstand. People often confuse total equity with the amount a lender will actually let them borrow, overlook that the credit line is secured by their home, or are surprised when payments rise after the draw period ends. We wanted a calculator that is simple enough for a first-time borrower and a set of guides that explain the traps in ordinary language.
If you find an error in the calculator, a figure that has gone out of date, or a sentence that is confusing, please tell us through the contact page. We would rather fix a mistake quickly than leave it standing. See our editorial and advertising disclosure for how the site is supported and our privacy policy for how we handle information.