Convert Carats to Metric Tons (Tonnes)

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

How to Convert Carats to Metric Tons

Scales are used to measure weight

To convert a carat measurement to a metric ton measurement, multiply the weight by the conversion ratio. One carat is equal to 2.0E-7 metric tons, so use this simple formula to convert:

metric tons = carats × 2.0E-7

The weight in metric tons is equal to the carats multiplied by 2.0E-7.

For example, here's how to convert 5 carats to metric tons using the formula above.
5 ct = (5 × 2.0E-7) = 1.0E-6 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.

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. 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 Measurements and Equivalent Metric Ton Conversions

Common carat values converted to the equivalent metric ton value
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
11 ct 0.0000022 t
12 ct 0.0000024 t
13 ct 0.0000026 t
14 ct 0.0000028 t
15 ct 0.000003 t
16 ct 0.0000032 t
17 ct 0.0000034 t
18 ct 0.0000036 t
19 ct 0.0000038 t
20 ct 0.000004 t
21 ct 0.0000042 t
22 ct 0.0000044 t
23 ct 0.0000046 t
24 ct 0.0000048 t
25 ct 0.000005 t
26 ct 0.0000052 t
27 ct 0.0000054 t
28 ct 0.0000056 t
29 ct 0.0000058 t
30 ct 0.000006 t
31 ct 0.0000062 t
32 ct 0.0000064 t
33 ct 0.0000066 t
34 ct 0.0000068 t
35 ct 0.000007 t
36 ct 0.0000072 t
37 ct 0.0000074 t
38 ct 0.0000076 t
39 ct 0.0000078 t
40 ct 0.000008 t

More Carat Weight Conversions

US Customary & Imperial Units
Convert to Tons
1 ct is equal to 2.2046E-7 tons
Convert to Pounds
1 ct is equal to 0.000441 pounds
Convert to Ounces
1 ct is equal to 0.007055 ounces
Other Units
Convert to Long Tons
1 ct is equal to 1.9684E-7 long tons
SI Units
Convert to Kilograms
1 ct is equal to 0.0002 kilograms
Convert to Grams
1 ct is equal to 0.2 grams
Convert to Milligrams
1 ct is equal to 200 milligrams