Convert Stone to US Ton (st → ton (US))

Converting stones to US tons is straightforward: multiply by the conversion factor. Follow these three steps to do it by hand or in your head.

1. 1
   Take your value in stones

   Start with the number of stones (st) you want to convert.
2. 2
   Multiply by 0.007

   The conversion factor from st to ton (US) is 0.007. Multiply your value by this number.
3. 3
   Read the result in US tons

   The result is your value in US tons (ton (US)).

Multiply the value in stones by 0.007. For the reverse direction, multiply by 142.85714.

• ✓1 stone = 14 lb = 6.35 kg exactly.
• ✓British speakers often say "11 stone 4" meaning 11 stone and 4 pounds — not 11.4 stone.
• ✓Multiply stones by 6.35 for a precise kg conversion.

• ✗Reading "11 stone 4" as 11.4 stone — it is 11 × 14 + 4 = 158 lb.
• ✗Using stones outside UK/Ireland contexts — audiences elsewhere will not understand.
• ✗Multiplying by 6 instead of 6.35 for a quick kg estimate — 5% error.

What is the Stone?

The stone equals exactly 14 pounds or 6.35029318 kilograms and remains the traditional British unit for personal body weight. Originally based on a stone literally used as a counterweight on a balance scale, the unit was standardized at 14 pounds by an Act of Parliament in 1835. While metrication has reduced its role in commerce, the stone persists in British everyday life — a person is described as '11 stone 4' (158 lb) rather than 72 kg — and is widely used in British and Irish weight-loss programs, medical contexts, and gym equipment. The stone is virtually unknown in the United States and most of the world. It relates to the pound (14 lb = 1 stone), the kilogram (1 stone ≈ 6.35 kg), and the long ton (160 stone = 1 long ton). Stones-and-pounds notation (like '11 st 4 lb') is the British equivalent of decimal kilograms.

• Human body weight in the UK and Ireland
• British medical charts and patient records
• British boxing and wrestling press reports

What is the US Ton?

The US short ton equals exactly 2,000 pounds or 907.18474 kilograms, and is the standard weight unit for American freight, mining, construction, and waste management. Its name distinguishes it from the longer UK long ton (2,240 lb). The short ton emerged in the United States during the 19th century to simplify calculations: 2,000 is a rounder number than 2,240. Today it dominates American industry — coal mining quotes production in short tons, dump trucks are rated by short-ton capacity, and the EPA tracks emissions in short tons. Imperial-to-metric confusion can be costly: in 1999, the Mars Climate Orbiter spacecraft was lost partly due to a units mismatch involving pounds and newtons. The short ton relates to the pound (2,000 lb = 1 ton), the metric ton (1 short ton ≈ 0.907 t), and the long ton (1 long ton = 1.12 short tons).

• US freight and trucking weight limits
• US coal and mining production
• US shipbuilding and heavy industry