Convert carats to stones
1 ct = 0.0000314946088836 st — exactly. Both units are defined against the SI, so this factor is a fraction, not an approximation.
0.000 031 494 608 883 6st
As a fraction: 10000/317514659
1 ct = 0.0000314946088836 st
How to convert carats to stones
Multiply the number of carats by 0.0000314946088836 to get stones.
Carat: The metric carat: exactly 200 mg.
Stone: Body weight in the UK and Ireland: 14 pounds.
Carat to Stone conversion table
| Carats (ct) | Stones (st) |
|---|---|
| 1 ct | 0.000 031 494 609 |
| 2 ct | 0.000 062 989 218 |
| 3 ct | 0.000 094 483 827 |
| 5 ct | 0.000 157 473 04 |
| 10 ct | 0.000 314 946 09 |
| 20 ct | 0.000 629 892 18 |
| 25 ct | 0.000 787 365 22 |
| 50 ct | 0.001 574 730 4 |
| 100 ct | 0.003 149 460 9 |
| 250 ct | 0.007 873 652 2 |
| 500 ct | 0.015 747 304 |
| 1000 ct | 0.031 494 609 |
Stone to Carat conversion table
| Stones (st) | Carats (ct) |
|---|---|
| 1 st | 31 751.466 |
| 2 st | 63 502.932 |
| 3 st | 95 254.398 |
| 5 st | 158 757.33 |
| 10 st | 317 514.66 |
| 20 st | 635 029.32 |
| 25 st | 793 786.65 |
| 50 st | 1 587 573.3 |
| 100 st | 3 175 146.6 |
| 250 st | 7 937 866.5 |
| 500 st | 15 875 733 |
| 1000 st | 31 751 466 |
Frequently asked
How many stones are in a carat?
One carat equals 0.00003149460888 stones (ct → st). That figure is exact, not rounded.
How do you convert carats to stones?
Multiply the number of carats by 0.0000314946088836 to get stones.
What is 1 st in carats?
One stone is 31751.4659 carats.
What is 10 ct in st?
10 ct = 0.000 314 946 09 st.
What exactly is a carat?
The metric carat: exactly 200 mg.
What exactly is a stone?
Body weight in the UK and Ireland: 14 pounds.