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To convert from Ton (t) to Stone (st), use the following formula:
Stone (st)
= 2000 × 114× Ton (t)
= 142.85714285714285714× Ton (t)
Let's convert 5 Ton (t) to Stone (st).
Using the formula:
5 × 142.85714285714285714 = 714.2857142857142857
Therefore, 5 Ton (t) is equal to 714.2857142857142857 Stone (st).
How many tons are in one stone? One Stone (st) contains 0.007 Tons (t) — the inverse of the factor above. Multiplying by 142.85714285714285714 takes you from tons to stones; multiplying by 0.007 brings you back.
Put in words: one ton equals 142.85714285714285714 stones, so the ton is the larger unit of this pair. Converting between them never changes the amount of weight being measured — only the size of the unit you count it in.
A ton (t) is a standard unit of mass.
In the United States, a ton is equivalent to 2,000 pounds (lb).
That said, the exact amount can vary depending on the system you use—US, British (Imperial), or metric—so it's essential to know which "ton" you mean to avoid mistakes.
While the US short ton is widely used, it's not the only definition.
The three main types of tons have different weights:
The distinction between these units is crucial in international shipping and trade to avoid costly confusion.
The spelling of the word tells you exactly which measurement system is being used.
Using "tonne" ensures precision and is the standard unit of measurement for science and international commerce.
The word "ton" originates from the Old English "tunne," which was a large cask used for storing wine, also known as a tun.
These casks were so typical that the weight of a full one became a standard unit of measurement.
Over time, this was standardized to 2,000 pounds, becoming the ton we use in the United States today.
The stone (st) is a unit of measurement equal to 14 pounds (lb).
It's part of the imperial system and is still commonly used in a few countries, especially for weighing people.
For use in international contexts or scientific applications, the stone is often converted to the metric system.
One stone is equal to exactly 6.35029318 kilograms (kg).
This precise conversion is used in international trade and science to ensure everyone is using the exact standard measurement.
Although it's an older unit, the stone remains the primary unit of measurement for body weight in the United Kingdom and Ireland.
It's common to hear someone state their weight as a combination of stone and pounds, like "12 stone 6 pounds."
The stone traces its origins back to the medieval English wool trade, where a "stone of wool" referred to a standard 14-pound measure used for buying and selling.
Stones for other goods could vary in weight—for example, a stone of glass was just 5 pounds—but over time, the 14-pound stone became the official legal standard.
The stone is almost never used on its own. Body weight in Britain and Ireland is quoted as stones and pounds, with the remainder written out rather than expressed as a decimal.
A person weighing 72 kg is "11 stone 4" — that is 11 st 4 lb, or 158 pounds — not "11.3 stone". Reading the decimal form as pounds is a common error: 11.3 st is 11 st 4.2 lb, close by coincidence, but 11.5 st means 11 st 7 lb, not 11 st 5 lb.
The conversions worth keeping to hand are:
The unit's survival is unusually specific. It was removed from British trade use by weights and measures legislation, so nothing is sold by the stone — shop scales read in kilograms and grams.
What survives is personal and conversational use: body weight, and by extension the weight of livestock and sporting figures such as boxing and horse-racing weights. Medical records in the UK are kept in kilograms, but patients are routinely told their weight in stones and pounds because that is the number they recognise.
Outside Britain and Ireland the unit is essentially unknown. The United States, despite sharing the pound, does not use the stone at all — American body weight is quoted in pounds alone, which is why a US figure of "158 lb" and a UK figure of "11 st 4" describe exactly the same person.
Here are some quick reference conversions from Ton (t) to Stone (st):
| Tons | Stones |
|---|---|
| 0.000001 t | 0.00014285714285714285714 st |
| 0.001 t | 0.14285714285714285714 st |
| 0.1 t | 14.285714285714285714 st |
| 1 t | 142.85714285714285714 st |
| 2 t | 285.71428571428571428 st |
| 3 t | 428.57142857142857142 st |
| 4 t | 571.42857142857142856 st |
| 5 t | 714.2857142857142857 st |
| 6 t | 857.14285714285714284 st |
| 7 t | 999.99999999999999998 st |
| 8 t | 1142.8571428571428571 st |
| 9 t | 1285.7142857142857143 st |
| 10 t | 1428.5714285714285714 st |
| 20 t | 2857.1428571428571428 st |
| 30 t | 4285.7142857142857142 st |
| 40 t | 5714.2857142857142856 st |
| 50 t | 7142.857142857142857 st |
| 100 t | 14285.714285714285714 st |
| 1000 t | 142857.14285714285714 st |
| 10000 t | 1428571.4285714285714 st |
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