Grams To Carats Conversion (g To Ct) - Inch Calculator

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• Grams to Carats Converter
• How to Convert Grams to Carats
• How Many Carats Are in a Gram?
• What Is a Gram?
• What Is a Carat?
• Gram to Carat Conversion Table
• References

Person Icon By Joe Sexton

Joe is the creator of Inch Calculator and has over 20 years of experience in engineering and construction. He holds several degrees and certifications.

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Sexton, J. (n.d.). Grams to Carats Converter. Inch Calculator. Retrieved February 18, 2026, from https://www.inchcalculator.com/convert/gram-to-carat/

How to Convert Grams to Carats

To convert a measurement in grams to a measurement in carats, multiply the weight by the following conversion ratio: 5 carats/gram.

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

carats = grams × 5

The weight in carats is equal to the weight in grams multiplied by 5.

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

carats = (5 g × 5) = 25 ct

How Many Carats Are in a Gram?

There are 5 carats in a gram, which is why we use this value in the formula above.

1 g = 5 ct

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

What Is a Gram?

A gram is a unit of mass equal to 1/1,000 of a kilogram or 0.035274 ounces, and is equivalent to the mass of one cubic centimeter, or one milliliter, 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.

Learn more about grams.

What Is a Carat?

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.

Learn more about carats.

Gram to Carat Conversion Table

Table showing various gram measurements converted to carats.

Grams	Carats
1 g	5 ct
2 g	10 ct
3 g	15 ct
4 g	20 ct
5 g	25 ct
6 g	30 ct
7 g	35 ct
8 g	40 ct
9 g	45 ct
10 g	50 ct
11 g	55 ct
12 g	60 ct
13 g	65 ct
14 g	70 ct
15 g	75 ct
16 g	80 ct
17 g	85 ct
18 g	90 ct
19 g	95 ct
20 g	100 ct
21 g	105 ct
22 g	110 ct
23 g	115 ct
24 g	120 ct
25 g	125 ct
26 g	130 ct
27 g	135 ct
28 g	140 ct
29 g	145 ct
30 g	150 ct
31 g	155 ct
32 g	160 ct
33 g	165 ct
34 g	170 ct
35 g	175 ct
36 g	180 ct
37 g	185 ct
38 g	190 ct
39 g	195 ct
40 g	200 ct

References

1. National Institute of Standards and Technology, Precious Metals Conversion Information, https://www.nist.gov/pml/owm/laws-and-regulations/precious-metals-conversion

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Weight IconConvert to Carats

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