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Weight

Convert carats to US tons

1 ct=2.2046e-7ton (US)

Use the converter below to change any carats value into US tons instantly — with formula, conversion table, and real-world examples.

2.2046e-7

Conversion formula

Forward
US tons = carats × 2.2046e-7
Reverse
carats = US tons × 4,535,923.7

Example: 10 ct × 2.2046e-7 = 2.2046e-6 ton (US).

About both units

From

Carat

ct

The metric carat equals 200 milligrams exactly. It is the standard unit for gemstone weight — diamonds, rubies, sapphires and emeralds are sold by the carat. Do not confuse with the purity carat (karat) used for gold (24K = pure gold).

Real-world: A 1-carat diamond weighs 200 mg and is typically 6.5 mm across. The Hope Diamond is 45.52 carats (9.1 g).
Read full carat reference →
To

US Ton

ton (US)

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.

Real-world: Max legal gross weight for a US 18-wheeler is 40 short tons (36.3 t). US coal output is quoted in short tons.
Read full us ton reference →

Carat to US Ton conversion table

Common carats to US tons values for quick reference.

Carat (ct)US Ton (ton (US))
1 ct2.2046e-7 ton (US)
5 ct1.1023e-6 ton (US)
10 ct2.2046e-6 ton (US)
25 ct5.5116e-6 ton (US)
50 ct1.1023e-5 ton (US)
100 ct2.2046e-5 ton (US)
250 ct5.5116e-5 ton (US)
500 ct0.0001102 ton (US)
1,000 ct0.0002205 ton (US)
5,000 ct0.001102 ton (US)

Tips & common mistakes

Quick tips

  • 1 carat = 200 mg = 0.2 g exactly since 1907.
  • Carat (gem weight) and karat (gold purity, 24 K = pure) are different words with different meanings.
  • A carat is divided into 100 points; a 0.25 ct diamond is called a "25-pointer".

Avoid these

  • Confusing carat (mass) with karat (gold purity).
  • Assuming a 2-carat diamond is twice the physical size of a 1-carat — volume scales with cube root of mass.
  • Using "karat" on gemstone certificates — international standard is "carat" spelled with a C.

Frequently asked questions

How many US tons in a carat?
One carat equals 2.2046e-7 US tons.
How do I convert carats to US tons?
Multiply the carat value by 2.2046e-7 to get the equivalent in US tons.
What is 100 carats in US tons?
100 carats equals 2.2046e-5 US tons.
Is a carat bigger than a us ton?
No. 1 carat equals 2.2046e-7 US tons, so one carat is smaller.
How to convert carats to US tons without a calculator?
Multiply by 0 for a quick estimate; use a calculator for precise results.

Related weight conversions

📊 See full comparison matrix →

More from Carat

ct → kg
1 = 0.0002 kg
ct → g
1 = 0.2 g
ct → mg
1 = 200 mg
ct → µg
1 = 200,000 µg
ct → lb
1 = 0.0004409 lb
ct → oz
1 = 0.007055 oz
ct → t
1 = 2.0000e-7 t
ct → ton (UK)
1 = 1.9684e-7 ton (UK)

More to US Ton

kg → ton (US)
1 = 0.001102 ton (US)
g → ton (US)
1 = 1.1023e-6 ton (US)
mg → ton (US)
1 = 1.1023e-9 ton (US)
µg → ton (US)
1 = 1.1023e-12 ton (US)
lb → ton (US)
1 = 0.0005 ton (US)
oz → ton (US)
1 = 3.1250e-5 ton (US)
t → ton (US)
1 = 1.10231 ton (US)
ton (UK) → ton (US)
1 = 1.12 ton (US)

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