Carats to Ounces (ct to oz)

Ounces to Carats (Swap Units)


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

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Carats to Ounces formula

oz =
ct * 0.0070548
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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.


Carats to Ounces formula

oz =
ct * 0.0070548


A unit of weight equal to one sixteenth of a pound or 16 drams or 28.349 grams


Carats to Ounces table

Print table
< Smaller Values Larger Values >
Carats Ounces
0ct 0.00oz
1ct 0.01oz
2ct 0.01oz
3ct 0.02oz
4ct 0.03oz
5ct 0.04oz
6ct 0.04oz
7ct 0.05oz
8ct 0.06oz
9ct 0.06oz
10ct 0.07oz
11ct 0.08oz
12ct 0.08oz
13ct 0.09oz
14ct 0.10oz
15ct 0.11oz
16ct 0.11oz
17ct 0.12oz
18ct 0.13oz
19ct 0.13oz
Carats Ounces
20ct 0.14oz
21ct 0.15oz
22ct 0.16oz
23ct 0.16oz
24ct 0.17oz
25ct 0.18oz
26ct 0.18oz
27ct 0.19oz
28ct 0.20oz
29ct 0.20oz
30ct 0.21oz
31ct 0.22oz
32ct 0.23oz
33ct 0.23oz
34ct 0.24oz
35ct 0.25oz
36ct 0.25oz
37ct 0.26oz
38ct 0.27oz
39ct 0.28oz
Carats Ounces
40ct 0.28oz
41ct 0.29oz
42ct 0.30oz
43ct 0.30oz
44ct 0.31oz
45ct 0.32oz
46ct 0.32oz
47ct 0.33oz
48ct 0.34oz
49ct 0.35oz
50ct 0.35oz
51ct 0.36oz
52ct 0.37oz
53ct 0.37oz
54ct 0.38oz
55ct 0.39oz
56ct 0.40oz
57ct 0.40oz
58ct 0.41oz
59ct 0.42oz