Contact
Found a number that looks wrong, or want a calculator we don’t have yet? We read every message.
Reporting a calculation problem
To help us check it quickly, please include:
- The link to your result (use the Share link button on the calculator; it contains your inputs).
- What you expected to see and where that figure came from.
We review every report against the formula and its sources, and correct the tool and its tests if we find an error.
Business enquiries
For advertising, partnerships or press, email the same address: exteriormath@gmail.com.