For Publishers & Bloggers

Embed our calculators — free

Drop a fast, responsive calculator into any page with one line of HTML. Themed light or dark, fully responsive, and always free.

Calculator Theme Height (px)

Include a visible attribution link below the widget Recommended — keeps the tool free, and adds a small credit link to your page.

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Live preview

The widget is responsive, respects your reader's light/dark preference (or force a theme), and links back to the full calculator. No tracking scripts run inside the frame. Free forever — we just ask you keep the small "Powered by" link.