How Many Pounds Is a Stone?
1 stone =14 pounds
A stone is a British and Irish unit of weight fixed at exactly 14 pounds, or 6.35 kilograms. Type any value below to convert it instantly.
Stone ↔ pounds ↔ kg converter
Stone to Pounds Chart
A quick-reference table for 1 to 20 stone, in pounds and kilograms.
| Stone | Pounds | Kilograms |
|---|---|---|
| 1 | 14 | 6.35 |
| 2 | 28 | 12.70 |
| 3 | 42 | 19.05 |
| 4 | 56 | 25.40 |
| 5 | 70 | 31.75 |
| 6 | 84 | 38.10 |
| 7 | 98 | 44.45 |
| 8 | 112 | 50.80 |
| 9 | 126 | 57.15 |
| 10 | 140 | 63.50 |
| 11 | 154 | 69.85 |
| 12 | 168 | 76.20 |
| 13 | 182 | 82.55 |
| 14 | 196 | 88.90 |
| 15 | 210 | 95.25 |
| 16 | 224 | 101.60 |
| 17 | 238 | 107.95 |
| 18 | 252 | 114.31 |
| 19 | 266 | 120.66 |
| 20 | 280 | 127.01 |
What Is a Stone in Weight?
The stone is one of the oldest units still in everyday use, and it has a specific, unchanging definition.
A stone (abbreviated "st") is a unit of mass in the British imperial system, defined as exactly 14 pounds, or 6.35029318 kilograms. Unlike many old units that varied by region or trade, the stone was formally standardized by the British Imperial Weights and Measures Act of 1835, which fixed it at 14 pounds once and for all.
Why Is a Stone 14 Pounds?
Before standardization, a "stone" could mean different weights depending on what was being weighed, wool, meat, or grain each had their own local stone value, ranging anywhere from 5 to 40 pounds. When Parliament unified weights and measures in the 19th century, 14 pounds was chosen as the standard because it was already the most common value used for weighing wool and general goods across England.
Why Do the British Still Use Stone for Weight?
The United Kingdom officially adopted the metric system decades ago for most measurements, but body weight is the one place stone has held on. It is deeply embedded in everyday British and Irish speech (people say "I weigh 11 stone," not "70 kilograms"), it appears on bathroom scales sold in the UK, and doctors' offices often record patient weight in stone and pounds rather than kilograms alone. The unit survives through habit and familiarity, not official policy.
A Stone in Other Units
The same 14-pound definition, expressed in the units you might need next.
1 stone × 6.35029318 = kilograms
1 stone × 16 lb-to-oz × 14 = ounces
1 stone × 6,350.29 = grams
Frequently Asked Questions
Why do Brits use stone for weight?
The stone was a standard unit for weighing goods, produce, and livestock in medieval Britain, and Parliament fixed it at 14 pounds in 1835. Britain and Ireland officially switched to metric decades ago, but "stone" stuck around as the everyday way people talk about body weight, the same way Americans still use pounds instead of kilograms.
What is a stone in weight, exactly?
A stone is a unit of mass equal to 14 pounds, or 6.35029318 kilograms. It sits between the pound and the hundredweight in the old British imperial system, and today it is used almost exclusively for describing a person's body weight.
What is 10 stone in pounds?
10 stone is 140 pounds (10 × 14), which is about 63.5 kilograms.
What is 20 stone in pounds?
20 stone is 280 pounds (20 × 14), which is about 127.01 kilograms.
How many kilograms is a stone?
One stone is 6.35029318 kilograms, usually rounded to 6.35 kg.
How heavy is 100 lbs in stone?
100 pounds is 7.14 stone, or 7 stone 2 pounds (100 ÷ 14 = 7 remainder 2).
How heavy is 80 lbs in stone?
80 pounds is 5.71 stone, or 5 stone 10 pounds (80 ÷ 14 = 5 remainder 10).
What is 180 lbs in stone and pounds?
180 pounds is 12.86 stone, or 12 stone 12 pounds (180 ÷ 14 = 12 remainder 12).
What is 500 lbs in stone and pounds?
500 pounds is 35.71 stone, or 35 stone 10 pounds (500 ÷ 14 = 35 remainder 10).
Is 180 pounds considered heavy?
It depends entirely on height, build, and body composition, not the number alone. A person's healthy weight range is usually judged against height (for example, using a BMI chart) rather than a single weight figure. If you are concerned about your weight, a doctor or registered dietitian can give guidance specific to you.