How many pounds are in 1 stone?

One stone equals exactly 14 pounds. This has been the standard definition since the British Weights and Measures Act of 1824.

How do I convert stone and pounds to just pounds?

Multiply the stone by 14 and add the remaining pounds. For example, 12 stone 5 lbs = (12 × 14) + 5 = 168 + 5 = 173 pounds.

Why is a stone 14 pounds?

The stone was standardized at 14 pounds (8 stone = 1 hundredweight of 112 lbs, and 20 hundredweight = 1 ton of 2,240 lbs). Before standardization, the stone varied from 4 to 26 pounds depending on the commodity being weighed.

Stones to Pounds (st to lbs) Converter

1 st = 14 lbs

1 Stone equals 14 Pounds (1 st = 14 lbs). Convert Stones to Pounds with formula, table, and examples.

One stone equals exactly 14 pounds. This conversion is essential for British and Irish people who know their weight in stone but need to express it in pounds for American contexts, medical forms, or fitness apps that only accept pounds.

How to Convert Stones to Pounds

lbs = st × 14

Multiply the value in Stones by 14

Take your value in Stones
Multiply by 14
Read the result in Pounds

Common Stones to Pounds Conversions

Stones (st)	Pounds (lbs)	Status
0.5 st	7 lbs
1 st	14 lbs
2 st	28 lbs
3 st	42 lbs
5 st	70 lbs
7 st	98 lbs
8 st	112 lbs
9 st	126 lbs
10 st	140 lbs
11 st	154 lbs
12 st	168 lbs
13 st	182 lbs
14 st	196 lbs
15 st	210 lbs
16 st	224 lbs
17 st	238 lbs
18 st	252 lbs
19 st	266 lbs
20 st	280 lbs
25 st	350 lbs
30 st	420 lbs
40 st	560 lbs
50 st	700 lbs

Good to Know About Stones to Pounds Conversion

The stone is one of the quirkiest imperial units still in everyday use. Americans have never used stone, creating confusion when Britons say 'I weigh twelve stone' - Americans must mentally calculate 12 × 14 = 168 pounds to understand.

Stones to Pounds: What You Need to Know

A person weighing 11 stone is 154 pounds. '10 stone 7' means 10 × 14 + 7 = 147 pounds. British bathroom scales show stone, but American fitness apps and medical equipment use pounds. This conversion is especially common when Britons interact with American health resources, gyms, or online tools.

What is a Stone? st

A British unit of mass equal to 14 pounds or approximately 6.35 kilograms. Commonly used in the UK and Ireland for body weight.

Imperial body weight (UK/Ireland) horse racing

Learn more about Stone →

What is a Pound? lbs

An imperial and US customary unit of mass equal to approximately 453.6 grams or 16 ounces. Widely used in the US and UK for body weight and commerce.

Imperial Us-customary body weight (US/UK) food (US) commerce

Learn more about Pound →

Going the other way? Use our Pounds to Stones converter.

Stones to Pounds FAQ

One stone equals exactly 14 pounds. This has been the standard definition since the British Weights and Measures Act of 1824.
Multiply the stone by 14 and add the remaining pounds. For example, 12 stone 5 lbs = (12 × 14) + 5 = 168 + 5 = 173 pounds.
The stone was standardized at 14 pounds (8 stone = 1 hundredweight of 112 lbs, and 20 hundredweight = 1 ton of 2,240 lbs). Before standardization, the stone varied from 4 to 26 pounds depending on the commodity being weighed.

Non-Frequently Asked Questions About Stones to Pounds

Questions nobody should ask - but someone did.

It IS pretty random. The 14-pound stone was standardized in 1389 for weighing wool. Before that, stones varied from 5 to 40 pounds depending on what you were weighing and which town you were in. Medieval measurement was basically negotiation.