Carats to Metric Tons (Tonnes) Conversion

Enter the weight in carats below to get the value converted to metric tons.

Results in Metric Tons:
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1 ct = 2.0E-7 t
Hint: use a scientific notation calculator to convert E notation to decimal

How to Convert Carats to Metric Tons

Scales are used to measure weight

To convert a carat measurement to a metric ton measurement, divide the weight by the conversion ratio.

Since one metric ton is equal to 5,000,000 carats, you can use this simple formula to convert:

metric tons = carats ÷ 5,000,000

The weight in metric tons is equal to the carats divided by 5,000,000.

For example, here's how to convert 5,000,000 carats to metric tons using the formula above.
5,000,000 ct = (5,000,000 ÷ 5,000,000) = 1 t

Carats and metric tons are both units used to measure weight. Keep reading to learn more about each unit of measure.


The carat is a unit of mass/weight equal to 200 milligrams.[1]

A carat is sometimes also referred to as a metric carat. Carats can be abbreviated as ct, and are also sometimes abbreviated as CD. For example, 1 carat can be written as 1 ct or 1 CD.

Metric Tons (Tonnes)

One tonne is equal to 1,000 kilograms or 2,204.6 pounds, and is used throughout the world as a unit of mass/weight.[2] One tonne is also equal to 1 megagram. The metric ton should not be confused with short tons, used primarily in the US, or long tons, used primarily in the UK.

The metric ton is an SI accepted unit for weight for use with the metric system. A metric ton is sometimes also referred to as a tonne. Metric tons can be abbreviated as t, and are also sometimes abbreviated as T, Te, or MT. For example, 1 metric ton can be written as 1 t, 1 T, 1 Te, or 1 MT.

In the US the unit is referred to as the metric ton, while the rest of the world refers to it as the tonne. Most often it's still pronounced as tun, but it is sometimes pronounced tunny.

Carat to Metric Ton Conversion Table

Carat measurements converted to metric tons
Carats Metric Tons
1 ct 0.0000002 t
2 ct 0.0000004 t
3 ct 0.0000006 t
4 ct 0.0000008 t
5 ct 0.000001 t
6 ct 0.0000012 t
7 ct 0.0000014 t
8 ct 0.0000016 t
9 ct 0.0000018 t
10 ct 0.000002 t
100 ct 0.00002 t
1,000 ct 0.0002 t
10,000 ct 0.002 t
100,000 ct 0.02 t
1,000,000 ct 0.2 t
10,000,000 ct 2 t


  1. National Institute of Standards and Technology, Precious Metals Conversion Information,
  2. National Institute of Standards and Technology, Specifications, Tolerances, and Other Technical Requirements for Weighing and Measuring Devices,