Navy Federal Credit Union Car Loan Calculator
function calculateLoan() {
let loanAmount = parseFloat(document.getElementById(‘loanAmount’).value);
let interestRate = parseFloat(document.getElementById(‘interestRate’).value) / 100 / 12;
let loanTerm = parseFloat(document.getElementById(‘loanTerm’).value) * 12;
if (isNaN(loanAmount) || isNaN(interestRate) || isNaN(loanTerm)) {
alert(“Please fill in all fields correctly.”);
return;
}
let monthlyPayment = (loanAmount * interestRate) / (1 – Math.pow(1 + interestRate, -loanTerm));
let totalInterest = (monthlyPayment * loanTerm) – loanAmount;
let totalLoanCost = loanAmount + totalInterest;
document.getElementById(‘monthlyPayment’).innerText = `Monthly Payment: $${monthlyPayment.toFixed(2)}`;
document.getElementById(‘totalInterest’).innerText = `Total Interest: $${totalInterest.toFixed(2)}`;
document.getElementById(‘totalLoanCost’).innerText = `Total Loan Cost: $${totalLoanCost.toFixed(2)}`;
document.getElementById(‘loanResults’).style.display = ‘block’;
}
