Direct conversion
Convert carat [ct] to stone [st] instantly with formula, examples, chart, and FAQs.
1 carat [ct] = 0.000031 stone [st]
1 carat [ct] = 0.000031 stone [st]
Example: 1 carat [ct] equals 0.000031 stone [st].
Weight and mass conversions use kilogram as the reference unit. Common factors include 1 pound = 0.45359237 kilogram and 1 ounce = 0.028349523125 kilogram.
Displayed results are rounded for readability. The calculator keeps enough precision for everyday use and switches to scientific notation for very large or very small values. Last reviewed: 2026-08-14.
The carat (ct) is a weight unit used to express measurements in this converter.
HistoryThis unit is included because it appears in practical measurement systems, technical references, product specifications, or everyday conversion needs.
Current useUse carat when comparing weight values, checking specifications, converting between systems, or preparing quick estimates.
The stone is an imperial mass unit equal to 14 pounds.
HistoryStone weights were historically used for trade and became standardized in the imperial system.
Current useStones are mainly used for body weight in the United Kingdom and Ireland.
| carat [ct] | stone [st] |
|---|---|
| 1 | 0.000031 |
| 2 | 0.000063 |
| 5 | 0.000157 |
| 10 | 0.000315 |
| 20 | 0.00063 |
| 25 | 0.000787 |
| 50 | 0.001575 |
| 100 | 0.003149 |
| 1000 | 0.031495 |
Use this formula: 1 carat [ct] = 0.000031 stone [st] Enter your value in the calculator and the result updates instantly.
1 carat [ct] equals 0.000031 stone [st].
Yes. Use the swap button in the calculator or open the related reverse conversion link when it is listed on this page.