let refinanceSteps = “”; const currencySymbol = “$”, fixedCurrency = “USD”; function calculateRefinance(){ refinanceSteps=””; const loanAmount = parseFloat(document.getElementById(“loanAmount”).value); const interestRate = parseFloat(document.getElementById(“interestRate”).value) / 100; const loanTerm = parseFloat(document.getElementById(“loanTerm”).value); const currentMonthlyPayment = parseFloat(document.getElementById(“currentMonthlyPayment”).value); if(isNaN(loanAmount) || isNaN(interestRate) || isNaN(loanTerm) || isNaN(currentMonthlyPayment) || loanAmount <= 0 || interestRate <= 0 || loanTerm <= 0){ alert("Please enter valid positive values for all fields."); return; } const monthlyRate = interestRate / 12; const numberOfPayments = loanTerm * 12; const refinancedPayment = (loanAmount * monthlyRate) / (1 – Math.pow(1 + monthlyRate, -numberOfPayments)); const savings = currentMonthlyPayment – refinancedPayment; document.getElementById("refinancedMonthlyPayment").value = formatCurrency(refinancedPayment); document.getElementById("savings").value = formatCurrency(savings); refinanceSteps += `Inputs:
Loan Amount: ${formatCurrency(loanAmount)}
Interest Rate: ${(interestRate * 100).toFixed(2)}%
Loan Term: ${loanTerm} years
Current Monthly Payment: ${formatCurrency(currentMonthlyPayment)}

`; refinanceSteps += `Formulas:
Refinanced Payment = Loan Amount × Monthly Rate / (1 – (1 + Monthly Rate)^-Number of Payments)
Monthly Savings = Current Monthly Payment – Refinanced Payment

`; refinanceSteps += `Results:
Refinanced Monthly Payment: ${formatCurrency(refinancedPayment)}
Monthly Savings: ${formatCurrency(savings)}
`; refinanceSteps += `Tip: Lower interest rates or longer loan terms can significantly reduce your monthly payment.`; if(document.getElementById(“calculationStepsRefinance”).style.display === “block”){ document.getElementById(“calculationStepsRefinance”).innerHTML = refinanceSteps; } } function resetRefinance(){ document.querySelectorAll(“#calculator input”).forEach(el => el.value = “”); refinanceSteps = “”; document.getElementById(“calculationStepsRefinance”).innerHTML = “

Not calculated yet.

“; } function toggleRefinanceSteps(){ const s = document.getElementById(“calculationStepsRefinance”); const a = document.getElementById(“toggleArrowRefinance”); if(s.style.display === “none” || s.style.display === “”){ s.style.display = “block”; a.style.transform = “rotate(180deg)”; s.innerHTML = refinanceSteps || “

Not calculated yet.

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