Get in touch
Questions, corrections and calculator requests are all welcome. The fastest way to reach us is by email:
If you're reporting a calculation that looks off, it helps to include the tool name, the numbers you entered, and the result you expected — that lets us check the formula against your specific case quickly.
If you'd like a calculator that isn't in our tool list yet, tell us the project and the figure you're trying to work out. We prioritise new tools partly by reader demand.