Carats to Grams: the quick answer
1 ct = 0.2 g
1 carat equals 0.2 grams
To convert carats to grams, multiply the value by 0.2. To go the other way, multiply grams by 5 to get carats.
Enter details
1 carat =
0.2 grams
1 gram =
5 carats
Formula
g = ct × 0.2
Handy values
5 ct = 1 g · 10 ct = 2 g · 100 ct = 20 g
Conversion at a glance
Formula
Carats to Grams
g = ct × 0.2
Grams to Carats
ct = g × 5
Where
- ct = the weight in carats
- g = the weight in grams
Every unit here is defined by its weight in kilograms, so the conversion factor is (kilograms per carat) ÷ (kilograms per gram).
Carats to Grams conversion table
| Carats (ct) | Grams (g) |
|---|---|
| 1 ct | 0.2 g |
| 2 ct | 0.4 g |
| 3 ct | 0.6 g |
| 4 ct | 0.8 g |
| 5 ct | 1 g |
| 6 ct | 1.2 g |
| 7 ct | 1.4 g |
| 8 ct | 1.6 g |
| 9 ct | 1.8 g |
| 10 ct | 2 g |
| 12 ct | 2.4 g |
| 14 ct | 2.8 g |
| 15 ct | 3 g |
| 20 ct | 4 g |
| 21 ct | 4.2 g |
| 24 ct | 4.8 g |
| 25 ct | 5 g |
| 30 ct | 6 g |
| 40 ct | 8 g |
| 50 ct | 10 g |
| 60 ct | 12 g |
| 75 ct | 15 g |
| 80 ct | 16 g |
| 100 ct | 20 g |
| 200 ct | 40 g |
| 250 ct | 50 g |
| 300 ct | 60 g |
| 400 ct | 80 g |
| 500 ct | 100 g |
| 750 ct | 150 g |
| 1,000 ct | 200 g |
Worked examples
About these units
Carat (ct). The metric carat is 200 milligrams, the unit for diamonds and gemstones.
Gram (g). The gram is one thousandth of a kilogram, the everyday unit for food, gold and small items.
Frequently asked questions
How many grams are in one carat?
There are 0.2 grams in one carat.
How do I convert carats to grams?
Multiply the number of carats by 0.2. For example, 10 carats equal 2 grams.
How many carats are in one gram?
One gram equals 5 carats.
How many grams is 12 carats?
2.4 grams. Other common values: 5 carats = 1 gram and 100 carats = 20 grams.
More weight conversions
From carats
ct to kg
ct to mg
ct to lb
ct to oz
ct to st
ct to t
ct to ton (US)
ct to ton (UK)
ct to q
ct to oz t
ct to tola
ct to µg
To grams
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