Contact

Corrections, tool requests, or a number that looks wrong — write to us. Email is the reliable route:

What helps a correction land

If a calculator gave you a surprising answer, include the tool’s name, the exact values you entered, and the answer you expected (and where you got it, if it came from another source). That is usually enough for us to reproduce the result within a minute and either fix the tool or explain the discrepancy — both outcomes have happened, and both are useful.

A quick form

Prefer a form? This one composes an email in your own mail app — it sends nothing by itself and stores nothing here.

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