Contact CalculatorHub
Last updated: 16 July 2026
We welcome questions, corrections and feedback. CalculatorHub is a free, independently operated reference layer of officially-sourced calculators, edited by James Graham.
The fastest way to reach us is by email:
- General enquiries, feedback and press: contact@calculatorhub.com
- Corrections and data or source questions: email the same address with the page URL and the figure you are asking about. See our Corrections Policy for how we verify and fix reported issues.
- Privacy and data-protection requests (access, deletion, opt-out): contact@calculatorhub.com. See our Privacy Policy and Do Not Sell or Share.
- Advertising: see our Advertising Policy.
We aim to reply within five business days. Reported errors in a sourced figure are prioritised.
Who operates CalculatorHub
CalculatorHub is operated and edited by James Graham. How our calculators are built, sourced and reviewed is set out on the About, Editorial standards and Methodology pages. Company and registration details are on the Imprint.
EU, UK and Switzerland data-protection representative
For visitors in the EU, UK and Switzerland, we have an appointed representative for data-protection matters (GDPR / UK GDPR Article 27). Their details and our verification are on the Imprint and GDPR pages.