Contact

Report a wrong result, a broken page, or an outdated rule.

Email: hello@rackcrunch.com

What to include

• The calculator or page (a link is best)
• The inputs you entered
• The result you got and what you expected
• Your browser and device, if the problem is a display issue

Security issues

If you found a security problem, please report it privately using the same method and put "Security" in the subject. See also security.txt.

Privacy

We only use what you send to answer your message. See the Privacy Policy.