Grams to Carats (g to ct)

Carats to Grams (Swap Units)


Note: Fractional results are rounded to the nearest 1/64. For a more accurate answer please select 'decimal' from the options above the result.

Note: You can increase or decrease the accuracy of this answer by selecting the number of significant figures required from the options above the result.

Note: For a pure decimal result please select 'decimal' from the options above the result.

Show formula

Grams to Carats formula

ct =
g * 5.0000
Show working
Show result in exponential format


A metric unit of weight equal to one thousandth of a kilogram


Grams to Carats formula

ct =
g * 5.0000


Abbreviated "ct." and spelled with a "c" is a measure of weight used for gemstones. One carat is equal to 1/5 of a gram (200 milligrams). Stones are measured to the nearest hundredth of a carat. A hundreth of a carat is also called a point. Thus a .10 carat stone can be called either 10 points, or 1/10 of a carat. Small stones like .05, and .10ct are most often referred to by point designations. Note that karat with a "K" is a measure of the purity of a gold alloy. A one carat round diamond of average proportions is approximately 6.5mm in diameter. Note that this relationship of weight and size is different for each family of stones. For example ruby and sapphire are both heavier than diamond (technically, they have a higher specific gravity, so a 1 carat ruby or sapphire is smaller in size than a on carat diamond. See Weights and Measures of Gold, Silver and Precious Gems for more information.


Grams to Carats table

Print table
< Smaller Values Larger Values >
Grams Carats
0g 0.00ct
1g 5.00ct
2g 10.00ct
3g 15.00ct
4g 20.00ct
5g 25.00ct
6g 30.00ct
7g 35.00ct
8g 40.00ct
9g 45.00ct
10g 50.00ct
11g 55.00ct
12g 60.00ct
13g 65.00ct
14g 70.00ct
15g 75.00ct
16g 80.00ct
17g 85.00ct
18g 90.00ct
19g 95.00ct
Grams Carats
20g 100.00ct
21g 105.00ct
22g 110.00ct
23g 115.00ct
24g 120.00ct
25g 125.00ct
26g 130.00ct
27g 135.00ct
28g 140.00ct
29g 145.00ct
30g 150.00ct
31g 155.00ct
32g 160.00ct
33g 165.00ct
34g 170.00ct
35g 175.00ct
36g 180.00ct
37g 185.00ct
38g 190.00ct
39g 195.00ct
Grams Carats
40g 200.00ct
41g 205.00ct
42g 210.00ct
43g 215.00ct
44g 220.00ct
45g 225.00ct
46g 230.00ct
47g 235.00ct
48g 240.00ct
49g 245.00ct
50g 250.00ct
51g 255.00ct
52g 260.00ct
53g 265.00ct
54g 270.00ct
55g 275.00ct
56g 280.00ct
57g 285.00ct
58g 290.00ct
59g 295.00ct