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Support Center

FourCalculator is a free tool built and maintained independently. If you've found a bug, spotted an incorrect formula, or want to request a new calculator, we'd love to hear from you.

Report an issue

Email supportquantumx@gmail.com with:

  • Which calculator you were using
  • What you expected vs. what happened
  • Your browser and device, if relevant

Frequently asked questions

Do I need an account?

No — every calculator works instantly, with nothing to sign up for.

Is my data saved anywhere?

Only in your browser's local storage (theme preference and recently used calculators). See our Privacy Policy for details.

Are the calculators accurate?

Every calculator uses standard, documented formulas. See our Terms of Service for the limits of that guarantee — for financial, medical, or legal decisions, verify with a professional.

Can't find what you're looking for? Email us at supportquantumx@gmail.com.