Contact
Found a wrong result, want a tool that does not exist yet, or spotted a mistake in the wording? Get in touch — bug reports are genuinely welcome.
We read everything. Replies usually take a few days — this is a one-person project, not a support desk.
What is most useful to send
- Which tool you were using, and the numbers you entered
- What result you got, and what you expected instead
- Your browser and whether you were on a phone or a computer
What we cannot do
We cannot give professional advice about your specific project — building, financial, medical or otherwise. The tools are planning aids; for decisions that carry real cost or risk, talk to a qualified professional.