Free Loan Calculator Tool

let loanSteps = “”; const currencySymbol = “$”, fixedCurrency = “USD”; function calculateLoan(){ loanSteps=””; const amount = parseFloat(document.getElementById(“loanAmount”).value); const term = parseInt(document.getElementById(“loanTerm”).value); const rate = parseFloat(document.getElementById(“interestRate”).value) / 100; if(isNaN(amount) || isNaN(term) || isNaN(rate) || amount <= 0 || term <= 0 || rate <= 0){ alert("Please enter valid positive values for all fields."); return; } const monthlyRate = rate / 12; const numberOfPayments = term * 12; const monthlyPayment = (amount * monthlyRate) / (1 – Math.pow(1 + monthlyRate, -numberOfPayments)); document.getElementById("monthlyPayment").value = formatCurrency(monthlyPayment); loanSteps += `Inputs:
Loan Amount: ${formatCurrency(amount)}
Term: ${term} years
Interest Rate: ${(rate * 100).toFixed(1)}%

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

`; loanSteps += `Results:
Monthly Payment: ${formatCurrency(monthlyPayment)}
`; if(document.getElementById(“calculationStepsLoan”).style.display===”block”){ document.getElementById(“calculationStepsLoan”).innerHTML = loanSteps; } } function resetLoan(){ document.querySelectorAll(“#calculator input”).forEach(el => el.value = “”); loanSteps = “”; document.getElementById(“calculationStepsLoan”).innerHTML = “

Not calculated yet.

“; } function toggleLoanSteps(){ const steps = document.getElementById(“calculationStepsLoan”); const arrow = document.getElementById(“toggleArrowLoan”); if(steps.style.display === “none” || steps.style.display === “”){ steps.style.display = “block”; arrow.style.transform = “rotate(180deg)”; steps.innerHTML = loanSteps || “

Not calculated yet.

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