About Online Calculators

Online Calculators is an independent UK reference site. It exists to do one thing well: provide calculators that are accurate for the United Kingdom, explained clearly, and free to use.

Why this site exists

Many calculator websites use generic, global formulas. A tax calculator built for one country gives the wrong answer in another; a measurement converter that ignores the difference between a UK pint and a US pint quietly misleads people. Most UK searchers end up on tools that were not built for them.

Online Calculators is built specifically for British figures. Income tax uses current HMRC bands. Scotland's separate income tax rates are handled as their own system, not glossed over. Road tax follows DVLA bands. Health tools follow NHS guidance. Where a result depends on a formula or a published standard, that method is set out in full on the page.

How we keep figures current

Rate-sensitive calculators - income tax, National Insurance, stamp duty, road tax, statutory pay and the rest - are reviewed against current official guidance each tax year, and after any Budget that changes a rate. The current figures on the site are for the 2026/27 tax year. Each calculator page shows the date its figures were last reviewed.

Who runs it

Online Calculators is run by Richard Barker. Richard Barker builds and maintains specialist UK reference tools, with a focus on accuracy and clear, current British data. You can read more on the author page, and see the site's approach to accuracy on the how we calculate page.

No sign-up, no clutter

Every calculator is free, with no account required and no limit on use. The site is deliberately uncluttered so the tool you came for is the thing you see.

Get in touch

Spotted a figure that looks wrong, or want a calculator that is not here yet? The contact page explains how to reach us. Corrections are taken seriously and acted on quickly.