Stone to Pounds Converter

Last updated: September 16, 2026

What a stone and a pound measure

The stone is a unit of weight in the British imperial system, equal to exactly 14 pounds. It is used mainly in the United Kingdom and Ireland to describe a person's body weight. The pound is the more widely known unit: it equals 16 ounces, or about 0.4536 kilograms, and it is the standard body-weight unit in the United States.

Since a stone is defined as a fixed number of pounds, converting between them is one of the simplest measurement tasks there is.

Converting stone to pounds

To change stone into pounds, multiply by 14.

For example, a weight of 11 stone is 11 × 14 = 154 pounds. A weight of 9 stone is 9 × 14 = 126 pounds. Because the factor is a whole number, many of these conversions are easy to do in your head.

Stone to pounds conversion table

How to read a weight given in stone and pounds

In the UK, body weight is often written as a mix, such as "11 st 4 lb." To turn that into total pounds, convert the stone part and add the extra pounds: 11 × 14 = 154, plus 4, gives 158 pounds. This matters when you fill in a form or app that only accepts pounds, since it expects the single combined number rather than the stone-and-pounds pair.

Stone, pounds, and kilograms together

Health settings often need kilograms, so it helps to see all three units at once:

So a person who weighs 11 stone weighs 154 pounds, or about 69.9 kilograms.

Where the stone is still used

The stone is common for personal weight in Britain and Ireland, where someone is far more likely to say "twelve stone" than "168 pounds." The United States dropped the stone long ago and uses pounds alone, while most other countries use kilograms. That split is exactly why a converter is handy: the same body weight can be stated three different ways depending on who is asking.

Converting pounds and kilograms back to stone

To reverse the math, divide pounds by 14 to get stone. From metric, divide kilograms by 6.35029. For example, 70 kilograms is about 11 stone, and 154 pounds is exactly 11 stone. This helps when a doctor gives a weight in kilograms but you are used to thinking in stone.

A quick body-weight reference

This short chart lines up all three units for common adult weights:

Where the stone comes from

The stone began as a very old trading unit, back when actual stones served as standard market weights across Europe. Different goods once used stones of different sizes, but British law eventually fixed the stone at 14 pounds. That is the standard still used today for body weight in the United Kingdom and Ireland, even though most other trade moved to pounds or kilograms long ago.

Is it "stone" or "stones"?

When you state a weight, the unit stays singular: you say "she weighs 12 stone," not "12 stones." The plural "stones" refers to actual rocks, not the weight. This small quirk often confuses people who are new to the term, but on forms and in speech the weight is always a number followed by the word "stone."

A quick mental-math trick

Because a stone is 14 pounds, you can multiply in two easy steps: times ten, then times four, and add the results. For 12 stone, that is 120 plus 48, which equals 168 pounds. It is a fast way to convert in your head, no calculator needed.

FAQs About Stone to Pounds

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