Stone to Carat Converter
Convert Stone (st) to Carat (ct) instantly. 1 st = 31,751.4659 ct.
Mass Converter
26 units available
1 st = 31,751.4659 ct
Formula:
ct = st × 31,751.4659With your value: 1 st = 31,751.4659 ct
How big is that?
Everyday references on a logarithmic scale, all expressed in stone so you can sanity-check the result.
Other Stone to Carat conversions
Stone to Carat Conversion Table
| Stone (st) | Carat (ct) |
|---|---|
| 0.5 | 15,875.73295 |
| 1 | 31,751.4659 |
| 2 | 63,502.9318 |
| 5 | 158,757.3295 |
| 10 | 317,514.659 |
| 15 | 476,271.9885 |
| 20 | 635,029.318 |
| 25 | 793,786.6475 |
| 50 | 1,587,573.295 |
| 100 | 3,175,146.59 |
| 250 | 7,937,866.475 |
| 500 | 15,875,732.95 |
| 1000 | 31,751,465.9 |
Carat to Stone Conversion Table
| Carat (ct) | Stone (st) |
|---|---|
| 0.5 | 1.574730e-5 |
| 1 | 3.149461e-5 |
| 2 | 6.298922e-5 |
| 5 | 0.000157 |
| 10 | 0.000315 |
| 15 | 0.000472 |
| 20 | 0.00063 |
| 25 | 0.000787 |
| 50 | 0.001575 |
| 100 | 0.003149 |
| 250 | 0.007874 |
| 500 | 0.015747 |
| 1000 | 0.031495 |
Where these values come from
Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.
Stone (st)
Mass
Traceable to the kilogram, defined by fixing the Planck constant at 6.626 070 15 × 10⁻³⁴ J·s. Avoirdupois masses derive from the 1959 international pound (0.453 592 37 kg exactly).
Source: BIPM, The International System of Units (SI), 9th edition, 2019 (updated 2024)
Bureau International des Poids et Mesures · Reviewed 2026-07-01
Carat (ct)
Mass
The metric carat is exactly 200 mg, agreed internationally in 1907.
National Institute of Standards and Technology (US) · Reviewed 2026-07-01
How to Convert Stone to Carat
To convert from Stone (st) to Carat (ct), multiply the value by 31,751.4659.
Formula: ct = st × 31,751.4659
Reverse: st = ct × 0.0000314946
Step-by-Step Example
- Start with your value in Stone. For example: 5 st
- Multiply by the conversion factor: 5 x 31,751.4659
- The result is: 158,757.3295 ct
About Stone
The stone equals 14 pounds or about 6.35 kg. It is primarily used in the UK and Ireland for expressing body weight.
Fun Fact: The stone varied in weight depending on the commodity being weighed until it was standardized at 14 pounds in 1835.
Common uses: body weight (UK), agriculture.
About Carat
The carat equals 200 milligrams and is the standard unit for measuring gemstone weight.
Fun Fact: The word "carat" comes from the carob seed, which was used as a balance weight in ancient gem trading.
Common uses: gemstones, diamonds, jewelry.
Frequently Asked Questions
How many Carat are in 1 Stone?
There are exactly 31,751.4659 Carat in 1 Stone. This means the conversion factor from Stone to Carat is 31,751.4659.
What is the formula to convert Stone to Carat?
The formula to convert Stone to Carat is: ct = st × 31,751.4659. For example, to convert 10 Stone to Carat, you would multiply 10 by 31,751.4659.
What is a Stone?
The stone equals 14 pounds or about 6.35 kg. It is primarily used in the UK and Ireland for expressing body weight.
What is a Carat?
The carat equals 200 milligrams and is the standard unit for measuring gemstone weight.
What are the common uses of Stone?
The Stone is commonly used in body weight (UK), agriculture.
Related Mass Conversions
Cite this page
UnitConvertLab. (2026). Stone to Carat converter. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/stone-to-carat