Contact CalcHandy
CalcHandy is a small independent site, and the messages we receive are one of the best ways we find mistakes and decide what to build next. We read every one.
Write to us at calchandytools@gmail.com. We aim to reply within a few business days. Please do not send passwords, payment card numbers or other sensitive personal information by email.
Report a mistake in a calculator
If a result looks wrong, tell us:
- The name of the calculator and the page address.
- The numbers you entered, including any units or options you chose.
- The result you saw and the result you expected, with a short note on how you worked it out.
- A link to an official source if you have one, such as a fee page, a government guide or a standard.
We check every report against the source, fix confirmed errors quickly, update the page's "last updated" date and record material corrections on our How We Calculate page.
Suggest a calculator
Tell us what you are trying to work out, what numbers you have and what answer you need. The more specific the better. For example, "I sell on a marketplace and need to know my profit after fees and shipping" is easier to build for than "a business calculator". We choose new tools by how many people need them and whether we can make them accurate.
Fee, rate and rule changes
Platforms and governments change prices and rules. If you notice that a fee, tax rule or standard on one of our pages is out of date, send us the link to the official page. We re-check fee and tax pages regularly and show the date we last checked.
Advertising, partnerships and press
If you would like to work with us, tell us who you are and what you have in mind. We only run advertising that is clearly separate from the calculators, and no advertiser can change a result.
What we cannot help with
We cannot give personal financial, tax, legal, electrical, veterinary or other professional advice, and we cannot see or fix problems with your payroll, your account on another platform or your own wiring. For those questions please contact the relevant professional, your employer or the official provider.
How we use your email
We use your email address only to reply to your message and to keep a record of corrections. We do not sell it or add it to a mailing list. See our Privacy Policy for details.