A lightweight, embeddable intestacy calculator that helps your visitors understand UK inheritance rules — and connects them with professional will-writing services.
Everything you need to integrate a professional intestacy calculator into your website or application.
Embed the full calculator with a single script tag. No build tools, no frameworks — just drop it into any HTML page and you are up and running in seconds.
Ships with light and dark themes out of the box. Use theme:'none' to strip all default styles and bring your own CSS for a fully branded experience.
WCAG compliant, fully keyboard navigable, and screen-reader friendly. Every user gets a first-class experience regardless of how they browse.
Explore different integration patterns and themes to find the right fit for your project.
The standard implementation with the default light theme. A great starting point to see the full question flow and results display.
View example →A CSS-agnostic dark theme built with theme:'none'. Shows how to completely restyle the calculator with your own design tokens.
Demonstrates the recommended script-tag integration for partners and affiliates. Minimal configuration, maximum flexibility.
View example →The most minimal setup possible. Just a container div and one script include — ideal for quick prototyping or testing.
View example →Optimised for email newsletters and marketing campaigns. Click-through functionality that works across all major email clients.
View example →Get up and running in under a minute using a script tag for instant integration.
<!-- Add a container element --> <div id="calculator"></div> <!-- Include the script --> <script src="intestacy-calculator.js"></script> <script> new IntestacyCalculator({ container: '#calculator', theme: 'light' }); </script>