Contact Sumwise

Email: [email protected]

Write to us about:

• a wrong value, a missing entry or a broken page: include the page address so we can find it quickly;
• privacy questions or requests about personal data: see also our privacy policy;
• advertising or partnership enquiries.

We read every message and usually reply within a few working days.

Before you write

Many questions are answered on the About page, which explains where our data comes from and how pages are checked. If you are reporting an error, the page address and the value you expected help us fix it in one go. We do not offer individual tutoring or homework help by email, and we never ask for passwords or payment details.