Convert Carat to Stone
Use this free converter to change carats (ct) into stones (st). Carat and stone both measure weight & mass. As a quick reference, 1 ct equals 0.000031494609 st, and 1 st equals 31751.466 ct.
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Stone (st)
0.000031494609
1 ct = 0.000031494609 st
Weight & Mass conversion table
| Carat | Stone |
|---|---|
| 0.01 | 3.1495e-7 |
| 0.1 | 0.0000031494609 |
| 0.5 | 0.000015747304 |
| 1 | 0.000031494609 |
| 2 | 0.000062989218 |
| 3 | 0.000094483827 |
| 5 | 0.00015747304 |
| 10 | 0.00031494609 |
| 20 | 0.00062989218 |
| 25 | 0.00078736522 |
| 50 | 0.0015747304 |
| 100 | 0.0031494609 |
| 1,000 | 0.031494609 |
How to convert Carat to Stone
Multiply the carat value by 0.000031494609 to get stones.
- Enter the number of carats you want to convert.
- The converter instantly shows the equivalent value in stones.
- Worked example: 15 ct × 0.000031494609 = 0.00047241913 st.
- Use the swap button to reverse the conversion (stone to carat).
About these units
Carat (ct)
- Definition
- A carat (ct) is a unit of mass for gemstones equal to exactly 200 milligrams.
- History
- It takes its name from the carob seed, once used as a counterweight, and was standardised at 0.2 g in 1907.
- Current use
- Carats express the weight of diamonds and other precious stones in the jewellery trade.
Stone (st)
- Definition
- A stone (st) is a British imperial unit of mass equal to 14 pounds, or about 6.35 kilograms.
- History
- Historically the stone varied by commodity before being fixed at 14 pounds in 1835.
- Current use
- Stones are still widely used in the UK and Ireland to express body weight.
Frequently asked questions
How many stones are in a carat?
There are 0.000031494609 st in 1 ct. To convert, multiply the number of carats by 0.000031494609.
How do I convert carats to stones?
Multiply the carat value by 0.000031494609 to get stones. For example, 10 ct = 0.00031494609 st.
Is this carat-to-stone converter free?
Yes. This converter is completely free, runs entirely in your browser, and requires no sign-up. Your inputs never leave your device.
Convert Carat to other weight & mass units
| Unit | 1 Carat equals |
|---|---|
| Kilogram (kg) | 0.0002 kg |
| Gram (g) | 0.2 g |
| Milligram (mg) | 200 mg |
| Microgram (µg) | 200000 µg |
| Metric Ton (t) | 2.0000e-7 t |
| Pound (lb) | 0.00044092452 lb |
| Ounce (oz) | 0.0070547924 oz |
| Stone (st) | 0.000031494609 st |
| US Ton (ton) | 2.2046e-7 ton |
| Imperial Ton (long ton) | 1.9684e-7 long ton |