Carat To Gram Conversion Chart

Carat (ct) Gram (g)
0.01 ct0.002 g
0.1 ct0.020000000000000004 g
1 ct0.2 g
2 ct0.4 g
5 ct1 g
10 ct2 g
20 ct4 g
50 ct10 g
100 ct20 g
500 ct100 g
1000 ct200 g

Convert from carat to gram formula

Total gram = Total carat x 0.2

For example, if you want to convert 100 Carat to Gram then,

100 ct = 100 x 0.2 = 20 g

Convert from gram to carat formula

Total carat =
Total gram
20 g
= 100 ct


The carat (ct) is a unit of mass equal to 200 mg, and is used for measuring gemstones and pearls, sometimes known as the metric carat. In terms of diamonds, a paragon is a flawless stone of at least 100 carats.


Gram (g), also spelled gramme, unit of mass or weight that is used especially in the centimetre-gram-second system of measurement. One gram is equal to 0.001 kg. The official International System of Units abbreviation is g, but gm has also been used.