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Editorial policy

How pages are written and checked

Each calculator page is written by Drew Halloran, the pen name of the site’s editor. The calculation code is tested against worked examples, including the examples printed on each page, every time the site is built. Rates and tables cite the source they come from.

Use of AI tools

AI tools were used to help write the code and the copy on this site. The calculation code is tested against worked examples every time the site is built, and rates and tables are checked against the sources they cite.

Independence

We don’t take money from bookmakers, tipsters or betting affiliates to feature them, and the calculators don’t link to betting sites. Advertising, if added, is kept visually separate from the calculators and never placed between the inputs and the result.

Responsible gambling

Every page carries an 18+ notice and the free National Gambling Helpline number. We don’t write content aimed at under-18s, and we don’t describe gambling as a way to make money.

Corrections

If you spot a mistake, tell us. We fix confirmed errors promptly and list them below with the date.

Corrections log

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