Contact Us
Questions, bug reports, and calculator requests are all welcome.
The fastest way to reach us:
We read every message and usually reply within a few days.
What to include
- Bug reports: which calculator, what you entered, and what result you expected.
- New tool requests: what you'd like to calculate — a link to an example is a bonus.
- Content corrections: the page and the sentence you think is wrong.
A note on advice
We can't provide personal medical, legal, or financial advice by email — for those questions, please consult a qualified professional.