Convert US Ton to Kilogram (ton (US) → kg)

Converting US tons to kilograms 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 US tons

   Start with the number of US tons (ton (US)) you want to convert.
2. 2
   Multiply by 907.18474

   The conversion factor from ton (US) to kg is 907.18474. Multiply your value by this number.
3. 3
   Read the result in kilograms

   The result is your value in kilograms (kg).

Multiply the value in US tons by 907.18474. For the reverse direction, multiply by 0.001102.

• ✓1 US short ton = 2000 lb = 907.18 kg.
• ✓Always clarify "short ton" in US international contracts — metric partners may assume 1000 kg.
• ✓US trucking and steel industries default to short tons; US scientific papers use metric.

• ✗Treating "ton" in US rail or truck freight as metric — the default is short ton.
• ✗Using 1000 kg as a shortcut for a US short ton — 93 kg short per ton.
• ✗Confusing short ton (907 kg) with the long ton (1016 kg) on older US paperwork.

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

What is the Kilogram?

The kilogram is the base SI unit of mass. Since May 2019, it has been defined by fixing the numerical value of Planck's constant to exactly 6.62607015 × 10⁻³⁴ joule-seconds — a major shift from the previous definition based on a physical platinum-iridium artifact (the International Prototype Kilogram or 'Le Grand K') stored at the BIPM near Paris since 1889. This redefinition links the kilogram to a fundamental constant of nature, making it reproducible by any sufficiently equipped laboratory. The kilogram is the global standard for body weight (most countries quote weight in kilograms), grocery sales, scientific measurements, and engineering. One liter of pure water at 4°C has a mass of almost exactly 1 kg — a coincidence designed into the original 1795 definition. The kilogram relates to the gram (1,000 g = 1 kg), the metric ton (1,000 kg = 1 t), and the pound (1 kg ≈ 2.205 lb).

• Human body weight in most of the world
• Grocery and retail food quantities in Europe
• Scientific and engineering mass measurements