Contact

Contact NumOwl

Found a wrong result, unclear wording, or a missing assumption? Send the calculator name, the inputs you used, and what looked off.

Contact email

Email [email protected]. This is the main contact address for corrections, calculator suggestions, and general site feedback.

What to include

For a calculator issue, include the page name, the numbers you entered, the unit system, and the result you expected. Screenshots are useful when the problem is visual, but the input values matter most for checking a formula.

Please avoid sending private financial, medical, or account information unless it is needed to explain the issue.

Corrections

If a formula, label, unit, example, or assumption looks wrong, send it as a correction request. Calculator corrections are reviewed against the formula and test cases before a page is changed.

More detail is available in the Corrections Policy.

Response time

NumOwl is a small product, so replies may not be immediate. Reports that affect calculator accuracy are handled before general suggestions.