Is a HELOC the same as a home equity loan?

No. A HELOC is usually a revolving credit line, while a home equity loan is typically a lump-sum installment loan.

What is combined loan-to-value?

Combined LTV compares the current mortgage plus the HELOC draw with the estimated home value.

Why can the real HELOC payment change?

Many HELOCs have variable rates, draw-period rules, fees, minimum-payment rules, and a later repayment period.

HELOC Calculator

Estimate a home equity line of credit limit, available draw, interest-only payment, repayment-period payment, and combined loan-to-value.

Estimated home value ($)

Current mortgage balance ($)

Maximum combined LTV (%)

Planned draw amount ($)

APR (%/year)

Repayment period (years)

What a HELOC calculator estimates

HELOC search intent is about how much home equity can be converted into a revolving credit line and what the draw could cost. The useful estimate starts with home value, current mortgage balance, a maximum combined loan-to-value limit, and the planned draw.

Estimated home equity before opening the line.
Maximum HELOC limit under the selected combined loan-to-value cap.
Interest-only payment during a draw period.
Repayment-period payment if the draw is amortized over the selected term.

Secured debt warning

A HELOC is usually secured by your home. Rates may be variable, line access can be limited by the lender, and fees or closing costs can change the real cost.

HELOC limit and payment formulas

E q u i t y = H o m e v a l u e - M or t g a g e ba l an ce

Equity is the ownership stake before the new line.

L in e l imi t = max (H o m e v a l u e \cdot C L T V_{ma x} - M or t g a g e ba l an ce, 0)

The line limit is capped by the selected maximum combined LTV.

I n t er es t o n l y = D r a w \cdot \frac{A P R}{12}

The repayment-period payment uses a standard fixed amortization model for the selected draw.

Frequently Asked Questions

Sources and References

Calculations are based on the listed reference sources. Links open in a new tab.

Updated: June 2, 2026

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