Contact Us
Found a calculator that gives a result you don't trust, hit a bug, or want to request a calculator that isn't here yet? We would like to hear about it.
Since this site doesn't run a server or store any data, the fastest way to reach us is by email:
When reporting a calculation issue, please include the calculator name and the exact inputs you used - that's usually enough for us to reproduce it and check the formula against its source.