Free Calculator Widgets for Your Website
Embed an interactive Kalkulo calculator directly on your blog, website, or in an article — completely free, no signup or API key needed. Pick a calculator below, copy the embed code, and paste it into your HTML.
- Find the calculator you want in the list below (filter by category or search).
- Click "Copy embed code" — a ready-made
<iframe>snippet is copied to your clipboard. - Paste the code wherever you want the calculator to appear in your HTML. It automatically adapts to the width of the space it's given.
Frequently asked questions
Are the widgets free to use?
Yes, completely free. No signup, API key, or agreement — just copy the code and paste it in.
Can I change the colors, width, or language of a widget?
No, the widget shows the calculator exactly as it appears on kalkulo.app. The width automatically adapts to the space it's given on your page. The language follows whichever page you copied the code from — a Norwegian calculator gives a Norwegian widget, an English one gives an English widget.
Do I have to link back to Kalkulo?
The widget always shows a small "Calculator by Kalkulo" link at the bottom of the frame. It's unobtrusive and can't be removed from the widget itself, but it's a natural part of the service being free.
Does the widget update if you change the calculator?
Yes. The widget loads the calculator directly from kalkulo.app every time your page opens, so any fixes or improvements show up automatically — you never need to swap out the code.