Contact
Corrections are especially welcome. A wrong formula on a construction calculator costs someone real money, so if a result looks off, please say so.
Emails are read by a person. Expect a reply within a few days.
Reporting an incorrect result
Please include:
- Which calculator, by name or link
- The exact values you entered
- The result you got, and the result you expected
- Where your expected figure comes from, if you have a source
Suggesting a calculator
Tell us what you were trying to work out and what you ended up doing instead. The gap between those two is usually the useful part.
Everything else
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