Bdo Housing Loan Calculator Philippines

let calculationSteps = “”; function calculateHousingLoan(){ calculationSteps = “”; const loanAmount = parseFloat(document.getElementById(“loanAmount”).value); const interestRate = parseFloat(document.getElementById(“interestRate”).value) / 100 / 12; const loanTerm = parseInt(document.getElementById(“loanTerm”).value) * 12; if (isNaN(loanAmount) || isNaN(interestRate) || isNaN(loanTerm) || loanAmount <= 0 || interestRate <= 0 || loanTerm <= 0) { alert("Please enter valid positive values for all fields."); return; } const monthlyPayment = loanAmount * interestRate / (1 – Math.pow(1 + interestRate, -loanTerm)); const totalPayment = monthlyPayment * loanTerm; const totalInterest = totalPayment – loanAmount; document.getElementById("monthlyPayment").value = formatCurrency(monthlyPayment); document.getElementById("totalPayment").value = formatCurrency(totalPayment); document.getElementById("totalInterest").value = formatCurrency(totalInterest); calculationSteps += `Inputs:
Loan Amount: ${formatCurrency(loanAmount)}
Annual Interest Rate: ${(interestRate * 12 * 100).toFixed(2)}%
Loan Term: ${loanTerm / 12} years

`; calculationSteps += `Formulas:
Monthly Payment = Loan Amount × [Interest Rate / (1 – (1 + Interest Rate)^-Loan Term)]
Total Payment = Monthly Payment × Loan Term
Total Interest = Total Payment – Loan Amount

`; calculationSteps += `Results:
Monthly Payment: ${formatCurrency(monthlyPayment)}
Total Payment: ${formatCurrency(totalPayment)}
Total Interest: ${formatCurrency(totalInterest)}
`; if (document.getElementById(“calculationSteps”).style.display === “block”) { document.getElementById(“calculationSteps”).innerHTML = calculationSteps; } } function resetHousingLoan(){ document.querySelectorAll(“#calculator input”).forEach(el => el.value = “”); calculationSteps = “”; document.getElementById(“calculationSteps”).innerHTML = “

Not calculated yet.

“; } function toggleCalculationSteps(){ const s = document.getElementById(“calculationSteps”); const a = document.getElementById(“toggleArrow”); if (s.style.display === “none” || s.style.display === “”) { s.style.display = “block”; a.style.transform = “rotate(180deg)”; s.innerHTML = calculationSteps || “

Not calculated yet.

“; } else { s.style.display = “none”; a.style.transform = “rotate(0deg)”; } } function formatCurrency(n){ return “₱” + n.toFixed(2); }