Công Cụ Tính ROI Đầu Tư AI Cho Doanh Nghiệp (AI ROI Calculator 2026)

document.addEventListener(‘DOMContentLoaded’, function() {
function formatMoney(n) {
return n.toLocaleString(‘vi-VN’) + ‘ đ’;
}

function calculateROI() {
var employees = parseInt(document.getElementById(‘input-employees’).value);
var salary = parseInt(document.getElementById(‘input-salary’).value);
var hours = parseFloat(document.getElementById(‘input-hours’).value);
var cost = parseInt(document.getElementById(‘input-cost’).value);

document.getElementById(‘lbl-employees’).innerText = employees + ‘ người’;
document.getElementById(‘lbl-salary’).innerText = formatMoney(salary);
document.getElementById(‘lbl-hours’).innerText = hours + ‘ giờ’;
document.getElementById(‘lbl-cost’).innerText = formatMoney(cost);

var hourlyRate = salary / (22 * 8);
var totalHoursSaved = employees * hours * 22;
var monthlyValue = totalHoursSaved * hourlyRate;
var netGain = monthlyValue – cost;
var roi = cost > 0 ? (netGain / cost) * 100 : 0;
var paybackDays = monthlyValue > 0 ? Math.round((cost / (monthlyValue / 22))) : 0;
var multiplier = cost > 0 ? (monthlyValue / cost).toFixed(1) : 0;

document.getElementById(‘res-monthly-value’).innerText = formatMoney(Math.round(monthlyValue));
document.getElementById(‘res-hours-saved’).innerText = Math.round(totalHoursSaved) + ‘ giờ’;
document.getElementById(‘res-roi’).innerText = (roi > 0 ? ‘+’ : ”) + Math.round(roi) + ‘%’;
document.getElementById(‘res-payback’).innerText = paybackDays <= 0 ? 'Tức thì' : '~ ' + paybackDays + ' ngày';
document.getElementById('res-multiplier').innerText = multiplier + ' lần';
}

['input-employees', 'input-salary', 'input-hours', 'input-cost'].forEach(function(id) {
var el = document.getElementById(id);
if (el) {
el.addEventListener('input', calculateROI);
}
});

calculateROI();
});