Ways to reach us
Pick whichever fits — or use the form below. Emailing the right address just helps us route your message faster.
Report a correction
Spotted a wrong figure, formula, or typo? Tell us which page and what looks off.
corrections@watercalculator.usSuggest a calculator
Need a tool we don't have yet? Reader suggestions shape what we build next.
suggestions@watercalculator.usSend us a message
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What happens next
A real person reads every message. We prioritise corrections and act on them quickly — when we fix something, we update the page and note the date. Suggestions go onto our build list, and while we can't promise every idea becomes a tool, they genuinely shape what we work on.
Want to know how we build and check our calculators, or the standards we hold to? See our methodology and editorial policy.