Free UK Calculator Widgets for Your Website
Add a professional UK calculator to your site or blog in seconds — free, responsive and always up to date. Just copy one line of code.
Last updated: June 2026
Embed any of these free UK calculators on your own website, blog or client portal. Each widget is responsive, loads fast, and is kept up to date with the latest official UK figures — so once you paste the code it updates itself every tax year. It’s free to use: just keep the small “Powered by UK Calculator” link that comes with the code.
How to add one: pick a calculator below, click the code box to select it, copy it, and paste it into your page’s HTML where you want the calculator to show.
UK Salary / Take-Home Pay Calculator
Let visitors work out their 2026/27 take-home pay after Income Tax and National Insurance.
Live preview
Copy & paste this code
UK Mortgage Repayment Calculator
Monthly repayment, total cost and total interest on any UK repayment mortgage.
Live preview
Copy & paste this code
Stamp Duty (SDLT) Calculator 2026
England & Northern Ireland stamp duty for standard, first-time and additional-property buyers.
Live preview
Copy & paste this code
UK VAT Calculator
Add or remove VAT at the 20% standard, 5% reduced or 0% rate.
Live preview
Copy & paste this code
UK Loan Repayment Calculator
Monthly repayment, total cost and interest on a personal loan.
Live preview
Copy & paste this code
Compound Interest Calculator
Show visitors how savings grow with regular contributions and compounding.
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Copy & paste this code
UK Income Tax Calculator 2026/27
Income Tax due, broken down by band, for any salary (2026/27).
Live preview
Copy & paste this code
Frequently asked questions
Are the calculator widgets free?
Yes — completely free to embed on any website. The only condition is keeping the visible “Powered by UK Calculator” attribution link in the embed code.
Will they stay up to date?
Yes. The widgets are hosted on ukcalculator.com using the latest official UK figures (2026/27 Income Tax, National Insurance, stamp duty, VAT). When rates change we update them centrally, so your embedded copy updates automatically.
Which platforms work?
Any platform that accepts an HTML iframe — WordPress, Wix, Squarespace, Ghost, Webflow, plain HTML and most CMSs.