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Carat to Gram Converter

VerifiedLast reviewed: Mar 3, 2026Fact checked by: Adil BaltiFactor: 1 g = 5 ctSource: Encyclopædia Britannica
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What is Carat to Gram Converter

This carat to gram converter translates weight measurements from carats (ct) to grams (g). It utilizes the standard international definition where 1 carat is precisely equal to 0.2 grams for gemstone grading.

Definitions of Carat and Gram

What is Carat?

A carat is a unit of mass used specifically for measuring gemstones and pearls. It is standardized as exactly 200 milligrams or 0.2 grams.

What is Gram?

A gram is a unit of mass in the metric system defined as one-thousandth of a kilogram. It serves as a fundamental metric unit for small weight measurements.

Carat to Gram Formula

g=ct5\text{g} = \frac{\text{ct}}{5}

Conversion explanation: Divide the value in Carat by 5 to get the equivalent value in Gram.

How to Convert Carat to Gram

To convert a value from carats to grams, multiply the value by the conversion multiplier:

Grams = Carats × 0.2

Step-by-Step Example

Converting a 5-carat gemstone weight into grams:

  • Identify the multiplier factor: 0.2.
  • Multiply 5 by the factor: 5 × 0.2 = 1.
  • Result: 5 carats is equal to 1 grams.

Carat to Gram Conversion Table

Carat [ct]Gram [g]
0.01 ct0.002 g
0.1 ct0.02 g
1 ct0.2 g
2 ct0.4 g
3 ct0.6 g
4 ct0.8 g
5 ct1 g
6 ct1.2 g
7 ct1.4 g
8 ct1.6 g
9 ct1.8 g
10 ct2 g
20 ct4 g
30 ct6 g
50 ct10 g
100 ct20 g
500 ct100 g
1000 ct200 g
Rate This Carat to Gram Converter:
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