Convert Carats to Grams

Enter the weight in carats below to get the value converted to grams.

Results in Grams:

1 ct = 0.2 g

How to Convert Carats to Grams

conversion scale showing carats and equivalent grams weight values

To convert a carat measurement to a gram measurement, multiply the weight by the conversion ratio. One carat is equal to 0.2 grams, so use this simple formula to convert:

grams = carats × 0.2

The weight in grams is equal to the carats multiplied by 0.2.

For example, here's how to convert 5 carats to grams using the formula above.

5 ct = (5 × 0.2) = 1 g

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

Carats

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.

Grams

A gram is the mass/weight equal to 1/1,000 of a kilogram, and is roughly equal to the mass of one cubic centimeter of water.

The gram, or gramme, is an SI unit of weight in the metric system. Grams can be abbreviated as g, for example 1 gram can be written as 1 g.

Carat Measurements and Equivalent Gram Conversions

Common carat values converted to the equivalent gram value
Carats	Grams
1 ct	0.2 g
2 ct	0.4 g
3 ct	0.6 g
4 ct	0.8 g
5 ct	1 g
6 ct	1.2 g
7 ct	1.4 g
8 ct	1.6 g
9 ct	1.8 g
10 ct	2 g
11 ct	2.2 g
12 ct	2.4 g
13 ct	2.6 g
14 ct	2.8 g
15 ct	3 g
16 ct	3.2 g
17 ct	3.4 g
18 ct	3.6 g
19 ct	3.8 g
20 ct	4 g
21 ct	4.2 g
22 ct	4.4 g
23 ct	4.6 g
24 ct	4.8 g
25 ct	5 g
26 ct	5.2 g
27 ct	5.4 g
28 ct	5.6 g
29 ct	5.8 g
30 ct	6 g
31 ct	6.2 g
32 ct	6.4 g
33 ct	6.6 g
34 ct	6.8 g
35 ct	7 g
36 ct	7.2 g
37 ct	7.4 g
38 ct	7.6 g
39 ct	7.8 g
40 ct	8 g