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Contact & report an issue
Found a wrong answer, a tool that won't load, or have an idea for a new calculator? We'd love to hear it.
Report a problem
Email us and, if you can, include these details so we can reproduce and fix it quickly:
• The calculator you were using (or paste the page link)
• The numbers you entered
• What you expected vs. what you got
• Your device / browser (e.g. iPhone Safari, Windows Chrome)
Suggest a calculator
Want a tool we don't have yet? Send the same address a quick note describing what it should calculate and we'll add it to the build queue.