If you run a payroll blog, a small business site, a union or association page, or anything else where visitors ask "how many hours did I work," you can drop our time card calculator straight onto your page. It is free, it needs no account, and nothing your visitors type leaves their browser.
Preview
This is exactly what your visitors would see, at whatever width you give it:
Add it to your site
Paste this where you want the calculator to appear. The small script resizes the box to fit the calculator, so it never gets cut off or leaves blank space.
<iframe id="centsum-embed-time-card"
src="https://centsum.com/embed/time-card-calculator/"
title="Time Card Calculator by CentSum"
style="width:100%;border:0;min-height:640px" loading="lazy"></iframe>
<script>
window.addEventListener('message', function (e) {
if (!e.data || e.data.source !== 'centsum-embed') return;
var f = document.getElementById('centsum-embed-time-card');
if (f && e.data.height) f.style.height = e.data.height + 'px';
});
</script>What it is, in plain terms
- A plain HTML
<iframe>, no plugin, no build step, works on WordPress (in an HTML block), Squarespace, Wix, Webflow or a hand-written page. - All the arithmetic happens in the visitor's own browser. We do not receive what anyone types, and we do not track which sites use it.
- A small "Powered by CentSum" credit stays inside the box. That credit is how we can keep offering this for free.
More calculators
Right now only the time card calculator is available this way. If your readers would use another one from our full list, let us know and we'll consider adding it.