Privacy Policy

1. Data controller

percentages.co.uk is operated as a UK-based website. All calculations are performed entirely in your browser. No calculation data is stored or transmitted to any server. If you have questions about this policy, please use our contact page.

2. What data we collect

Calculators, worksheets, practice questions, revision resources and embed pages

No personal data is collected when you use any calculator, view a worksheet or revision resource, work through practice questions, or interact with an embedded calculator. All calculations run in your browser and no input data is sent to our servers.

Email enquiries

If you email us, we will receive your email address and the content of your message. We use this information for the sole purpose of responding to your enquiry. We do not add you to any mailing list or use this information for any other purpose.

Google Analytics 4

We use Google Analytics 4 to collect anonymised usage data including pages visited, time on site, device type and approximate location at country level. No personally identifiable information is collected through GA4. You can opt out via your browser settings or by installing the Google Analytics opt-out browser add-on.

Google Search Console

We use Google Search Console to monitor search performance. This service does not collect any personal data from users of this site.

Browser localStorage

We use your browser's localStorage to store your dark mode preference and calculator like button state. This data never leaves your device and is not accessible to us. It is not a cookie and is not shared with any third party.

3. Cookies

The site uses the following cookies:

• Google Analytics 4 cookies for anonymised analytics only
• No advertising cookies
• No tracking cookies
• No third-party marketing cookies

localStorage is used for user preferences as described above. This is not a cookie but browser storage that stays on your device.

4. Worksheets and printable resources

All worksheets and revision resources are provided as free printable web pages. No data is collected when you view or print a worksheet. You may print and photocopy worksheets for personal and classroom educational use.

5. Embeddable calculators

The site offers embeddable calculator iframes that third parties may place on their own websites. When a user interacts with an embedded calculator on a third-party site, the same privacy terms apply as using the calculator directly on percentages.co.uk. We do not track which third-party sites embed our calculators.

6. API

The site provides a free read-only calculation API at /api/calculate. No personal data is required or collected to use the API. Usage may be monitored in aggregate for performance purposes only.

7. Third-party links

The site links to external websites including gov.uk, bbc.co.uk/bitesize, ofqual.gov.uk and ons.gov.uk. We are not responsible for the privacy practices of these sites.

8. Children

The site is used by students including those under 13. We do not knowingly collect any personal data from children. No registration or account is required to use any part of the site.

9. Your rights under UK GDPR

Under UK GDPR and the Data Protection Act 2018 you have the right to access, correct or delete any personal data held about you. The only personal data we hold is email correspondence you have sent to us.

To exercise any of these rights, please contact us via our contact page.

You also have the right to lodge a complaint with the Information Commissioner's Office (ICO) at ico.org.uk.

10. Changes to this policy

We may update this policy from time to time. The date at the top of this page will reflect the most recent update.