Found a mistake, spotted something unclear or thought of a tool that would save people time? I would genuinely like to hear about it.

Suggest a new calculator

The quickest route is the Suggest a Tool page. Explain what you want to calculate, what information the user would enter and what result would be useful.

Not every suggestion will be added, but every suggestion will be considered.

Report a problem

When reporting a calculator problem, please include:

  • the name or address of the page;
  • the values you entered;
  • the result you received;
  • what you expected to happen instead.

Those details make it much easier to reproduce and correct the issue.

Email

You can email suggest@theusefulsite.co.uk.

Please do not send sensitive personal, medical, financial or case-related information. A description of the calculation problem is normally enough.

Advertising enquiries

The site is supported by advertising, but it does not currently accept paid placements that alter calculator results, editorial conclusions or recommendations.

Response times

The Useful Site is independently maintained rather than staffed by a customer-service team. Messages are read, but an immediate reply cannot always be promised.

Other useful pages

My PromiseWhat visitors can expect from every part of the site. Editorial PolicyHow pages are researched, checked and corrected. Site MapBrowse the complete collection of subjects and tools.
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