Calculate available home equity, HELOC limits, and CLTV ratio with equity build-up projection charts.
Home value and mortgage debt answer two different questions here: how much equity you own and how much may fit beneath a chosen combined loan-to-value limit. The calculator subtracts secured debt from property value, measures debt against value as CLTV, and estimates the remaining capacity for a HELOC. Its projection chart extends the entered value and debt assumptions over time. The common surprise is that total home equity is not the same as borrowable equity because the CLTV ceiling reserves part of the property's value.
A concrete input and expected output from the current implementation.
Input
Home value: $400,000; mortgage balance: $240,000; maximum CLTV: 80%
Expected output
Current home equity: $160,000; current CLTV: 60%; estimated maximum HELOC: $80,000
Equity is $400,000 minus $240,000. An 80% CLTV permits up to $320,000 of total secured debt, leaving $80,000 after the $240,000 mortgage; checking again, $320,000 divided by $400,000 is exactly 80%.
Current equity is property value minus the entered mortgage and other included home-secured debt. CLTV expresses combined secured debt as a percentage of property value. For example, $240,000 divided by $400,000 is 0.60, or 60%. This percentage describes leverage against the home; it does not measure the owner's income, credit quality, or ability to make payments.
The selected maximum CLTV first sets a total-debt ceiling: property value multiplied by that percentage. Subtracting existing secured debt gives the estimated room for a HELOC, with no positive room when existing debt already reaches the ceiling. The chart then applies the entered future value and debt assumptions to show how projected equity and borrowing room change over the selected period.
A CLTV limit leaves a portion of the property's value outside the borrowing calculation. With a $400,000 home, $240,000 mortgage, and 80% ceiling, total equity is $160,000 but only $80,000 fits below the $320,000 debt ceiling. The remaining $80,000 is still equity, but it is above that assumed borrowing limit.
No. It shows the mathematical result of the assumptions entered for future property value and debt. A later offer can differ because the lender may use a new appraisal, another CLTV limit, and underwriting factors that this equity calculation does not establish, including income, credit history, existing obligations, product availability, and minimum line requirements.
The example and behavioral notes were checked against the browser implementation. Standards and primary references below define the relevant format, formula, or platform behavior.
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