EMAIL DIRECTLY
What to include
A quick note on what you were calculating and what looked wrong (or what's missing) is enough to act on — screenshots help but aren't required.
Common reasons to reach out
Report an inaccurate resultA calculation, formula, or grading scale that doesn't match what you expected.
Suggest a calculator or featureA grading scenario or scale this site doesn't cover yet.
Ask a privacy questionAnything not covered clearly enough in the privacy policy.
General feedbackWhat's working, what isn't, or what would make this more useful.