Accessibility statement

We want every calculator to work for everyone, with a keyboard, a screen reader, zoom or a phone. Our target is WCAG 2.1 level AA.

What we do

• Every page is checked with the axe-core automated accessibility engine (WCAG 2.1 A/AA and best-practice rules) in light mode, dark mode and at phone width before release.
• All inputs have visible labels. Invalid entries are flagged with aria-invalid and never clear your results.
• Calculators work entirely with a keyboard, with visible focus indicators. Wide tables become scrollable, focusable regions on small screens.
• Plan drawings have text alternatives, and every number in a drawing is also shown in a table.
• Animation plays once, and not at all if your system asks for reduced motion.

Known limitations

• Plan drawings are summarized in text rather than fully described element by element.
• Automated testing doesn’t catch everything. We haven’t yet done a manual audit with assistive-technology users.

Report a problem

Email [Owner to provide: contact email] with the page and what went wrong. We will try to fix it and to give you the answer you needed in another format.