Carats to grams
grams = carats × 0.2
Reverse: grams to carats
How to convert carats to grams
One carat is 0.2 grams, so multiply the number of carats by 0.2. For example, 20 carats is 20 × 0.2 = 4 grams. To go back, divide by the same number, or multiply by 5.
Quick estimate
Multiplying by about 0.2 gets within 0.0% of the exact answer, which is enough to check that a result makes sense.
Where it comes up
Mass conversions come up in cooking and baking, shipping and luggage limits, body weight, medicine doses and buying food by weight.
| carats | grams |
|---|---|
| 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 |
| 11 ct | 2.2 g |
| 12 ct | 2.4 g |
| 13 ct | 2.6 g |
| 14 ct | 2.8 g |
| 15 ct | 3 g |
| 16 ct | 3.2 g |
| 17 ct | 3.4 g |
| 18 ct | 3.6 g |
| 19 ct | 3.8 g |
| 20 ct | 4 g |
| 25 ct | 5 g |
| 30 ct | 6 g |
| 40 ct | 8 g |
| 50 ct | 10 g |
| 60 ct | 12 g |
| 70 ct | 14 g |
| 75 ct | 15 g |
| 80 ct | 16 g |
| 90 ct | 18 g |
| 100 ct | 20 g |
| 120 ct | 24 g |
| 150 ct | 30 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 |
| 1,500 ct | 300 g |
| 2,000 ct | 400 g |
| 5,000 ct | 1,000 g |
| 10,000 ct | 2,000 g |
Questions
How many grams are in a carat?
0.2 grams.
How do I convert carats to grams in a spreadsheet?
Put the value in A1 and type =A1*0.2, then fill the formula down the column.
Are the values in the table exact?
They are calculated from the exact definitions of the units and rounded only for display. Open any row for the full working.