Embed code · widget · Time & Date
Embed the Leap Year Calculator on your site
Add the Leap Year Calculator to any page. Copy the code below — it auto-resizes and follows your site theme.
Preview
Theme
<div class="calcro-widget" data-tool="an-bisect" data-locale="en" data-theme="auto">
<a href="https://calcula.ro/en/leap-year-calculator">Leap Year Calculator — calcula·ro</a>
</div>
<script async src="https://calcula.ro/widget.js"></script>iAbout this calculator
Check whether a year is a leap year (366 days, with 29 February) and find the next leap years.
?Frequently asked questions
Is it free?
Yes. No account and no impression limit.
Can I embed the Leap Year Calculator on WordPress or another CMS?
Yes. It works anywhere you can paste HTML — WordPress, Wix, Webflow or plain HTML.
Will it slow my site down?
No. The widget lazy-loads inside an isolated iframe and only runs when it becomes visible.
Is it mobile-friendly?
Yes. It fills the container width: side-by-side on wide screens, stacked on mobile.