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Tools Free calculators that show their working

Contact

We would love to hear from you, especially if you have found an error.

Email

maservices131@gmail.com

We aim to reply within two working days.

Reporting a mistake

Accuracy matters more to us than anything else. If a result looks wrong, please include:

  • the page address of the tool,
  • the values you entered (or use the tool’s Share button and send us the link),
  • the result you expected and where that figure comes from.

Confirmed errors are fixed as a priority and noted on the page. See our editorial policy for how corrections work.

Suggesting a tool

Tell us what you were trying to work out and which country it applies to. Popular requests go to the top of our list.

What we cannot help with

We cannot give personal financial, medical or legal advice, or see anything you entered into a tool, because that information never reaches us. For personal advice, speak to a qualified professional such as your doctor, midwife, a regulated financial adviser or a free service like MoneyHelper (UK) or the CFPB (US).