Contact

Corrections, suggestions and commercial enquiries are all welcome.

Get in touch

Registered office: The Studio, Brentmoor Road, Woking, Surrey, GU24 9NE

BusinessCalculator.co.uk is operated by Bizworks Online Limited, a company registered in England and Wales (company number 11958108).

Reporting a calculation error

If a figure looks wrong, please tell us which calculator you were using, the numbers you entered and the result you expected. That is usually enough for us to reproduce the problem and correct it. Corrections are treated as a priority. See our methodology for how the calculations are produced and tested.

Suggesting a calculator

We are adding calculators steadily. If there is a calculation you find yourself doing on paper or in a spreadsheet, tell us what it is and how you use it.

What we cannot do

We cannot give tax, accounting, legal or financial advice, or comment on an individual's circumstances. For that, speak to a qualified accountant or adviser.

Last reviewed: 7 September 2026