A stone is a unit of weight used primarily in the United Kingdom and Ireland to measure body weight. One stone equals 14 pounds or approx. 6.35 kilograms. It's not part of the official metric or imperial systems, but it remains a widely recognized standard in health, fitness, and everyday conversation in the UK. If someone says they weigh "11 stone," they mean 154 pounds (11 × 14).
The stone has historical roots going back to ancient Europe, where stones of specific weight were used in trade. Over time, England standardized the stone to mean 14 pounds in 1835, and that value is still used today. While most countries have adopted the metric system, the stone remains part of British culture—primarily when referring to personal weight.
How is the Stone Used: The stone is most commonly used to express body weight in the UK and Ireland. You'll often hear weights given in stone and pounds together, like "11 stone 4 pounds" instead of 158 pounds or 71.6 kg. It's rarely used in scientific, industrial, or commercial applications today. The metric system has replaced it in those contexts.
A US ton, also known as a short ton, is a unit of weight used primarily in the United States. One US ton equals exactly 2,000 pounds or approximately 907.1847 kilograms. It's commonly used in industries like freight, construction, and agriculture to measure large quantities of weight, mostly bulk goods. The US ton is not the same as the imperial ton (also called the long ton) or the metric tonne, so it's important to understand the distinction when converting.
The concept of a "ton" comes from the old term "tun," which referred to a large barrel used for shipping wine. Over time, the word evolved into a unit of weight. The United States standardized the ton to 2,000 pounds, distinguishing it from the British imperial long ton (2,240 pounds) and the metric tonne (1,000 kg).
Today, the US ton remains part of the customary system of units used throughout the country.
How Is the US Ton Used: The US ton is a practical unit for expressing large-scale weight, especially in commercial, agricultural, and industrial sectors. It's widely used for:
1 st = 0.007 US ton
Let’s say you want to convert 100 st to US ton.
Using the formula:
100 × 0.007 = 0.7 US ton
So, 100 st is approximately 0.7 US ton.
| Stone (st) | US Ton (US ton) |
|---|---|
| 1 st | 0.007 US ton |
| 2 st | 0.014 US ton |
| 3 st | 0.021 US ton |
| 4 st | 0.028 US ton |
| 5 st | 0.035 US ton |
| 6 st | 0.042 US ton |
| 7 st | 0.049 US ton |
| 8 st | 0.056 US ton |
| 9 st | 0.063 US ton |
| 10 st | 0.07 US ton |
| 11 st | 0.077 US ton |
| 12 st | 0.084 US ton |
| 13 st | 0.091 US ton |
| 14 st | 0.098 US ton |
| 15 st | 0.105 US ton |