Free Online Tools for the United Kingdom

Britain kept some imperial and went metric on the rest, and the mixture is not tidy. Road signs are in miles but fuel is sold in litres, so miles per gallon is a sum across two systems. People weigh themselves in stone and buy potatoes in kilograms. VAT is already inside every shelf price by law, unlike America. And the tax year starts on 6 April, a date that makes sense only if you know it was dragged there by a calendar change in 1752. The tools below assume those conventions.

Most used in United Kingdom 12

Financial Calculators 21

Tax & Money 1

Health & Fitness 25

Typing Tests & Games 22

Image Tools 17

PDF Tools 10

Text Tools 15

Converters & Units 51

Developer Tools 21

SEO & Web Tools 10

Everyday Tools 16

Tools for United Kingdom

Most of these 209 tools — percentages, unit conversion, PDF and image work — are the same wherever you are. The ones that are not are the tax, salary and savings calculators, and those are listed at the top of this page for United Kingdom. Amounts appear in GBP where a currency is involved.

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Frequently Asked Questions

How do I work out the VAT inside a price?

Divide by 1.2 for the standard 20% rate: a 120 price contains 100 of goods and 20 of VAT. Do not take 20% of the gross figure — that gives 24 and is wrong, and it is the single most common mistake on a hand-written invoice. The reduced rate of 5% covers things like domestic fuel and child car seats, so divide by 1.05 there. Some goods are zero-rated rather than exempt, which is not the same thing: zero-rated sales still count toward your turnover and still let you reclaim input VAT, while exempt ones do not.

When do I have to register for VAT?

When your VAT-taxable turnover crosses the registration threshold in any rolling twelve months — not a calendar or tax year, which catches people out. The threshold has been 90,000 since April 2024. You must also register if you expect to cross it within the next thirty days alone. Registering voluntarily below the threshold can be worth it if your customers are themselves VAT-registered, because they reclaim what you charge and you reclaim your own input VAT. Check the current figure on gov.uk before acting on any calculator, including this one.

Why does the UK tax year start on 6 April?

It is a leftover from the calendar change of 1752, when Britain moved from the Julian to the Gregorian calendar and eleven days vanished from September. The Treasury did not want to lose eleven days of revenue, so the year-end was pushed from 25 March to 5 April, and a further day was added in 1800. So the tax year runs 6 April to 5 April, personal allowances reset on that date, and ISA allowances do too. It has nothing to do with the calendar year and nothing to do with April being convenient.

Why do UK cars seem to do more miles per gallon than American ones?

Because the gallons are different sizes. An imperial gallon is about 4.546 litres; a US gallon is about 3.785. So the same car returns roughly twenty percent more miles per gallon on paper in Britain than in America without burning a drop less fuel. Comparing a UK MPG figure with a US one directly is meaningless unless you convert first. The converter here treats gallons as imperial by default and lets you switch, which matters if you are reading an American review of a car sold here.

How many pounds are in a stone, and why is it still used?

Fourteen pounds, so 12 stone 4 is 172 pounds or about 78 kilograms. Stone survives almost entirely for body weight — nobody weighs luggage or shopping in it — and it persists because it produces small, easy numbers for a human being. Medical records and gyms increasingly use kilograms, which is why the same person meets both units in the same week. The converter shows stone with the leftover pounds separately, because 12.29 stone is not how anyone actually says it.

How much can I put into an ISA each year?

The annual allowance has been 20,000 across all your ISAs combined since 2017-18 — not 20,000 in each. It resets on 6 April with the tax year, and it does not carry over: an unused allowance is simply gone on 6 April. Interest and gains inside an ISA are free of income tax and capital gains tax, which is why an ISA at a given headline rate beats an ordinary savings account paying the same. The compound interest calculator will project the growth; it does not know your allowance, so keep the annual cap in mind yourself.

Is the price on the shelf what I pay at the till?

Yes, for consumer sales. UK law requires prices shown to consumers to include VAT, so the label is the price. This is the opposite of the United States, where tax is added at the register. Business-to-business pricing is often quoted excluding VAT instead, which is why a trade quote can look cheaper than a retail one for the same item — it is the same price described differently. If a quote does not say which it is, ask, because on a large job the difference is a fifth.

Why do my documents print badly on paper from the US?

Because Britain uses A4 and the United States uses Letter, and they are different shapes. A4 is 210 by 297mm; Letter is about 216 by 279mm, so it is wider and shorter. An A4 document sent to a US printer loses roughly 18mm off the bottom, and a Letter document printed here leaves a gap and slightly narrow margins. When a PDF tool on this site asks for a page size, choose A4, and use "fit to page" in the print dialog for anything that arrived from America.

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