Free UK VAT Calculator Widget
Accountants, bloggers and business websites can embed the PoundKit VAT calculator in one line of HTML. It runs entirely in your visitor’s browser — free to use, with no signup and no data collection.
Why embed this calculator?
- Free to use on any website
- No signup or API key
- Works on any website or CMS
- Lightweight — a single small script
- UK VAT focused: 20%, 5%, 0% and custom rates
- No cookies, no analytics, no tracking
Live preview
Embed code
<script type="module" src="https://poundkit.co.uk/assets/poundkit-vat-widget.js"></script> <poundkit-vat-calculator></poundkit-vat-calculator>
Paste both lines where you want the calculator to appear. You can set starting values with attributes, for example <poundkit-vat-calculator rate="5" amount="250">.
How it works
- Your visitors enter an amount and a VAT rate, and see net, VAT and gross.
- No personal data is collected, sent or stored — the maths runs in the browser.
- No account is required, by you or by your visitors.
- The widget links back to the full PoundKit VAT calculator with a small credit line.
Technical details
- Native Web Component (
poundkit-vat-calculator). - Shadow DOM isolation — your site’s CSS and the widget’s CSS never clash.
- No third-party dependencies and no framework required.
- Client-side calculations only; the widget makes no network requests.
- No server data storage, no cookies, no URL modification.
- Responsive down to narrow sidebars and mobile widths.
Prefer an iframe? Use the iframe version instead.
More from PoundKit
The widget is provided for general information only and does not replace professional accounting advice. VAT rates are based on official UK guidance — check official sources when needed.