Contact

Found a wrong number? That is the one message worth sending.

Report a calculation error

If a calculator produces a result you believe is wrong, send the URL including the values you entered — the link encodes your inputs, which makes the problem reproducible. Include what you expected and why. Accuracy corrections are prioritised over everything else.

Email us

For calculation errors, feature requests, or partnerships, email [email protected]. We aim to respond within 48 hours.

What is not answered here

• Questions requiring advice on your specific business, tax position or legal situation.
• Requests to review or promote a product.
• Requests for backlinks, guest posts or paid placements.

Corrections and suggestions

Suggestions for calculators that do not exist yet are welcome. The most useful request names the decision you are trying to make and the numbers you have available, rather than just the tool name.