carats to stones
Convert carat to stone — instant, free, with the formula shown.
1 ct=3.1495e-5 st
How to convert carat to stone
To convert carat to stone, multiply by 3.1495e-5:
st = ct × 3.1495e-5
For example, 10 ct × 3.1495e-5 = 0.000315 st.
ct to st conversion table
| carats (ct) | stones (st) |
|---|---|
| 1 ct | 3.1495e-5 st |
| 2 ct | 6.2989e-5 st |
| 5 ct | 0.000157 st |
| 10 ct | 0.000315 st |
| 25 ct | 0.000787 st |
| 50 ct | 0.001575 st |
| 100 ct | 0.003149 st |
| 250 ct | 0.007874 st |
| 500 ct | 0.015747 st |
| 1000 ct | 0.031495 st |
Other carat conversions
Convert to stone from another unit
ct to st — frequently asked
How many stones are in 1 carat?
1 carat = 3.1495e-5 stones (ct × 3.1495e-5 = st).
What is the formula to convert carat to stone?
Multiply your carat value by 3.1495e-5 to get stone.
How do I convert 10 carats to stones?
10 ct = 0.000315 st. For 100 ct the answer is 0.003149 st. Use the calculator on this page for any other value.