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ton (US)
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What is a us ton?

The US tonnage unit — 2000 pounds, 9% smaller than a metric ton

Definition

The US short ton equals 2000 pounds or 907.18474 kilograms. It is the standard tonnage unit in the United States for freight, coal and industrial weights. It is 9.3% smaller than the metric ton — a meaningful gap in large-volume contracts.

Common uses

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

🌍 Real-world scale

Max legal gross weight for a US 18-wheeler is 40 short tons (36.3 t). US coal output is quoted in short tons.

Convert from US tons

11 conversions
US Ton to Kilogram1 ton (US) = 907.185 kgUS Ton to Gram1 ton (US) = 907,184.74 gUS Ton to Milligram1 ton (US) = 907,184,740 mgUS Ton to Microgram1 ton (US) = 907,184,740,000 µgUS Ton to Pound1 ton (US) = 2,000 lbUS Ton to Ounce1 ton (US) = 32,000 ozUS Ton to Metric Ton1 ton (US) = 0.9072 tUS Ton to UK Ton1 ton (US) = 0.8929 ton (UK)US Ton to Stone1 ton (US) = 142.857 stUS Ton to Carat1 ton (US) = 4,535,923.7 ctUS Ton to Grain1 ton (US) = 14,000,000 gr

Convert to US tons

11 conversions
Kilogram to US Ton1 kg = 0.001102 ton (US)Gram to US Ton1 g = 1.1023e-6 ton (US)Milligram to US Ton1 mg = 1.1023e-9 ton (US)Microgram to US Ton1 µg = 1.1023e-12 ton (US)Pound to US Ton1 lb = 0.0005 ton (US)Ounce to US Ton1 oz = 3.1250e-5 ton (US)Metric Ton to US Ton1 t = 1.10231 ton (US)UK Ton to US Ton1 ton (UK) = 1.12 ton (US)Stone to US Ton1 st = 0.007 ton (US)Carat to US Ton1 ct = 2.2046e-7 ton (US)Grain to US Ton1 gr = 7.1429e-8 ton (US)

Tips

  • 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.

Common mistakes

  • 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.

FAQ about the us ton

What is a us ton?
The US short ton equals 2000 pounds or 907.18474 kilograms. It is the standard tonnage unit in the United States for freight, coal and industrial weights. It is 9.3% smaller than the metric ton — a meaningful gap in large-volume contracts.
Where is the us ton used?
The us ton is commonly used for: US freight and trucking weight limits; US coal and mining production; US shipbuilding and heavy industry.
What is an example of a us ton in real life?
Max legal gross weight for a US 18-wheeler is 40 short tons (36.3 t). US coal output is quoted in short tons.
What category does the us ton belong to?
The us ton is a unit of weight, part of the 12-unit weight category on UnitConv.
How accurate are us ton conversions?
All conversion factors follow NIST and BIPM international standards to 8 significant figures — the highest practical accuracy.
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