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Found a bug, spotted a miscalculation, or have an idea for a calculator we haven't built yet? Drop us a line.
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Email usbestfreecalculator@gmail.com
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Corrections & bugsbestfreecalculator@gmail.com
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How fast will I hear back?
Editors review the inbox every weekday. Most messages receive a reply within two business days.
Reported inaccuracies are prioritized — if you've found a math error, we'll fix it and notify you when the patch ships.
Before you write
Many answers are in our editorial policy — how we source formulas, review tools, and handle updates.
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