Carats to Grains

Bookmark Page Grains to Carats (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

Convert Carats to Grains

gr =
ct * 3.0865
Show working
Show result in exponential format


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.


Convert Carats to Grains

gr =
ct * 3.0865


1/7000 pound; equals a troy grain or 64.799 milligrams


Carats to Grains table
Print table
< Smaller Values Larger Values >
Carats Grains
0ct 0.00gr
1ct 3.09gr
2ct 6.17gr
3ct 9.26gr
4ct 12.35gr
5ct 15.43gr
6ct 18.52gr
7ct 21.61gr
8ct 24.69gr
9ct 27.78gr
10ct 30.86gr
11ct 33.95gr
12ct 37.04gr
13ct 40.12gr
14ct 43.21gr
15ct 46.30gr
16ct 49.38gr
17ct 52.47gr
18ct 55.56gr
19ct 58.64gr
Carats Grains
20ct 61.73gr
21ct 64.82gr
22ct 67.90gr
23ct 70.99gr
24ct 74.08gr
25ct 77.16gr
26ct 80.25gr
27ct 83.33gr
28ct 86.42gr
29ct 89.51gr
30ct 92.59gr
31ct 95.68gr
32ct 98.77gr
33ct 101.85gr
34ct 104.94gr
35ct 108.03gr
36ct 111.11gr
37ct 114.20gr
38ct 117.29gr
39ct 120.37gr
Carats Grains
40ct 123.46gr
41ct 126.55gr
42ct 129.63gr
43ct 132.72gr
44ct 135.80gr
45ct 138.89gr
46ct 141.98gr
47ct 145.06gr
48ct 148.15gr
49ct 151.24gr
50ct 154.32gr
51ct 157.41gr
52ct 160.50gr
53ct 163.58gr
54ct 166.67gr
55ct 169.76gr
56ct 172.84gr
57ct 175.93gr
58ct 179.02gr
59ct 182.10gr
Metric Conversion Table iPhone & Android app Weight Currency Temperature Length Area Volume Speed Time Angle Pressure Energy and Power Health and Wellbeing