HELOC Calculator

This professional HELOC calculator helps homeowners and advisors estimate maximum line size, combined loan-to-value (CLTV), interest-only draw payments, amortized repayment payments, and total interest. It is designed for quick planning, lender prequalification checks, and side-by-side scenario analysis.

Audit: Complete
Formula (LaTeX) + variables + units
This section shows the formulas used by the calculator engine, plus variable definitions and units.
Formula (extracted LaTeX)
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Formula (extracted text)
Maximum line: \( L_{\max} = \max\!\big(0,\ \text{CLTV}_{\max}\cdot V - M \big) \) CLTV after draw: \( \text{CLTV}_{\text{after}} = \dfrac{M + D}{V} \) Interest-only payment during draw: \( I_{\text{draw, m}} = D \cdot \dfrac{r_d}{12} \) Amortized repayment payment: \( P = \dfrac{r_r/12 \cdot B}{1 - (1 + r_r/12)^{-n}} \), with \( B = D \) at repayment start Total interest: \( I_{\text{total}} = I_{\text{draw, m}} \cdot n_d + (P \cdot n_r - B) \)
Variables and units
  • P = principal (loan amount) (currency)
  • r = periodic interest rate (annual rate ÷ payments per year) (1)
  • n = total number of payments (years × payments per year) (count)
  • M = periodic payment for principal + interest (currency)
  • T = property tax (annual or monthly depending on input) (currency)
  • I = homeowners insurance (annual or monthly depending on input) (currency)
Sources (authoritative):
Changelog
Version: 0.1.0-draft
Last code update: 2026-01-19
0.1.0-draft · 2026-01-19
  • Initial audit spec draft generated from HTML extraction (review required).
  • Verify formulas match the calculator engine and convert any text-only formulas to LaTeX.
  • Confirm sources are authoritative and relevant to the calculator methodology.
Verified by Ugo Candido on 2026-01-19
Profile · LinkedIn
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HELOC Calculator

This professional HELOC calculator helps homeowners and advisors estimate maximum line size, combined loan-to-value (CLTV), interest-only draw payments, amortized repayment payments, and total interest. It is designed for quick planning, lender prequalification checks, and side-by-side scenario analysis.

Audit: Complete
Formula (LaTeX) + variables + units
This section shows the formulas used by the calculator engine, plus variable definitions and units.
Formula (extracted LaTeX)
\[','\]
','
Formula (extracted text)
Maximum line: \( L_{\max} = \max\!\big(0,\ \text{CLTV}_{\max}\cdot V - M \big) \) CLTV after draw: \( \text{CLTV}_{\text{after}} = \dfrac{M + D}{V} \) Interest-only payment during draw: \( I_{\text{draw, m}} = D \cdot \dfrac{r_d}{12} \) Amortized repayment payment: \( P = \dfrac{r_r/12 \cdot B}{1 - (1 + r_r/12)^{-n}} \), with \( B = D \) at repayment start Total interest: \( I_{\text{total}} = I_{\text{draw, m}} \cdot n_d + (P \cdot n_r - B) \)
Variables and units
  • P = principal (loan amount) (currency)
  • r = periodic interest rate (annual rate ÷ payments per year) (1)
  • n = total number of payments (years × payments per year) (count)
  • M = periodic payment for principal + interest (currency)
  • T = property tax (annual or monthly depending on input) (currency)
  • I = homeowners insurance (annual or monthly depending on input) (currency)
Sources (authoritative):
Changelog
Version: 0.1.0-draft
Last code update: 2026-01-19
0.1.0-draft · 2026-01-19
  • Initial audit spec draft generated from HTML extraction (review required).
  • Verify formulas match the calculator engine and convert any text-only formulas to LaTeX.
  • Confirm sources are authoritative and relevant to the calculator methodology.
Verified by Ugo Candido on 2026-01-19
Profile · LinkedIn
]], displayMath: [['\\[','\\]']] }, svg: { fontCache: 'global' } };, svg: { fontCache: 'global' } };

HELOC Calculator

This professional HELOC calculator helps homeowners and advisors estimate maximum line size, combined loan-to-value (CLTV), interest-only draw payments, amortized repayment payments, and total interest. It is designed for quick planning, lender prequalification checks, and side-by-side scenario analysis.

Audit: Complete
Formula (LaTeX) + variables + units
This section shows the formulas used by the calculator engine, plus variable definitions and units.
Formula (extracted LaTeX)
\[','\]
','
Formula (extracted text)
Maximum line: \( L_{\max} = \max\!\big(0,\ \text{CLTV}_{\max}\cdot V - M \big) \) CLTV after draw: \( \text{CLTV}_{\text{after}} = \dfrac{M + D}{V} \) Interest-only payment during draw: \( I_{\text{draw, m}} = D \cdot \dfrac{r_d}{12} \) Amortized repayment payment: \( P = \dfrac{r_r/12 \cdot B}{1 - (1 + r_r/12)^{-n}} \), with \( B = D \) at repayment start Total interest: \( I_{\text{total}} = I_{\text{draw, m}} \cdot n_d + (P \cdot n_r - B) \)
Variables and units
  • P = principal (loan amount) (currency)
  • r = periodic interest rate (annual rate ÷ payments per year) (1)
  • n = total number of payments (years × payments per year) (count)
  • M = periodic payment for principal + interest (currency)
  • T = property tax (annual or monthly depending on input) (currency)
  • I = homeowners insurance (annual or monthly depending on input) (currency)
Sources (authoritative):
Changelog
Version: 0.1.0-draft
Last code update: 2026-01-19
0.1.0-draft · 2026-01-19
  • Initial audit spec draft generated from HTML extraction (review required).
  • Verify formulas match the calculator engine and convert any text-only formulas to LaTeX.
  • Confirm sources are authoritative and relevant to the calculator methodology.
Verified by Ugo Candido on 2026-01-19
Profile · LinkedIn