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Weight

Convert carats to metric tons

1 ct=2.0000e-7t

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

2.0000e-7

Conversion formula

Forward
metric tons = carats × 2.0000e-7
Reverse
carats = metric tons × 5,000,000

Example: 10 ct × 2.0000e-7 = 2.0000e-6 t.

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

Metric Ton

t

The metric ton (also "tonne" in British English) equals 1000 kilograms exactly. It is the standard tonnage unit in international shipping, agriculture and industrial production. Do not confuse it with the US short ton (907 kg) or the British long ton (1016 kg).

Real-world: A mid-size car weighs about 1.5 t. A 20-ft shipping container holds up to 28 t. Global steel output is about 1,900 million tonnes per year.
Read full metric ton reference →

Carat to Metric Ton conversion table

Common carats to metric tons values for quick reference.

Carat (ct)Metric Ton (t)
1 ct2.0000e-7 t
5 ct1.0000e-6 t
10 ct2.0000e-6 t
25 ct5.0000e-6 t
50 ct1.0000e-5 t
100 ct2.0000e-5 t
250 ct5.0000e-5 t
500 ct0.0001 t
1,000 ct0.0002 t
5,000 ct0.001 t

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 metric tons in a carat?
One carat equals 2.0000e-7 metric tons.
How do I convert carats to metric tons?
Multiply the carat value by 2.0000e-7 to get the equivalent in metric tons.
What is 100 carats in metric tons?
100 carats equals 2.0000e-5 metric tons.
Is a carat bigger than a metric ton?
No. 1 carat equals 2.0000e-7 metric tons, so one carat is smaller.
How to convert carats to metric 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 → ton (US)
1 = 2.2046e-7 ton (US)
ct → ton (UK)
1 = 1.9684e-7 ton (UK)

More to Metric Ton

kg → t
1 = 0.001 t
g → t
1 = 1.0000e-6 t
mg → t
1 = 1.0000e-9 t
µg → t
1 = 1.0000e-12 t
lb → t
1 = 0.0004536 t
oz → t
1 = 2.8350e-5 t
ton (US) → t
1 = 0.9072 t
ton (UK) → t
1 = 1.01605 t

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