1 carat to stones
1 ct = 0.00003149 st. Change the amount below, or read the formula and the reference table further down.
1 carat equals
stones
1 ct = 0.00003149 st
The formula
Carats and stones both measure weight & mass from the same zero, so a single multiplier does the job.
st = ct × 0.0000314946
Going the other way? Convert stones to carats.
Carats to stones table
Values either side of 1 ct.
| Carats (ct) | Stones (st) |
|---|---|
| -4 | -0.000126 |
| -3.5 | -0.00011 |
| -3 | -0.000094 |
| -2.5 | -0.000079 |
| -2 | -0.000063 |
| -1.5 | -0.000047 |
| -1 | -0.000031 |
| -0.5 | -0.000016 |
| 0 | 0 |
| 0.5 | 0.000016 |
| 1 | 0.000031 |
| 1.5 | 0.000047 |
| 2 | 0.000063 |
| 2.5 | 0.000079 |
| 3 | 0.000094 |
| 3.5 | 0.00011 |
| 4 | 0.000126 |
| 4.5 | 0.000142 |
| 5 | 0.000157 |
| 5.5 | 0.000173 |
| 6 | 0.000189 |
Questions people ask
- How many stones are in a carat?
- One carat equals 0.0000314946 stones.
- How do I convert carats to stones by hand?
- Multiply the number of carats by 0.0000314946. For a rough check, 0 is close enough for most everyday use.
- What is 1 carat in stones?
- 1 carat is 0.00003149 stones.
Calcuit generates this page from a unit table, so the factors here match every other page on the site.