Stone to Carats (st to ct) Converter

How to convert stone to carats

Formulact = st × 31,751.4659

Multiply the value in stone by 31,751.4659. To go the other way, multiply by 0.00003149460888 (or divide by 31,751.4659).

A stone is larger than a carat: one stone contains 31,751.4659 carats.

Worked examples

1 stone1 st × 31,751.4659 = 31,751.4659 ct
5 stone5 st × 31,751.4659 = 158,757.3295 ct
10 stone10 st × 31,751.4659 = 317,514.659 ct
20 stone20 st × 31,751.4659 = 635,029.318 ct
100 stone100 st × 31,751.4659 = 3,175,146.59 ct

Stone to carats conversion table

Values are calculated by the conversion engine and rounded to 8 significant figures.

Stone to carats: 0.1–10 st
Stone (st)	Carats (ct)
0.1 st	3,175.1466 ct
0.25 st	7,937.8665 ct
0.5 st	15,875.733 ct
1 st	31,751.466 ct
2 st	63,502.932 ct
3 st	95,254.398 ct
4 st	127,005.86 ct
5 st	158,757.33 ct
6 st	190,508.8 ct
7 st	222,260.26 ct
8 st	254,011.73 ct
9 st	285,763.19 ct
10 st	317,514.66 ct

Stone to carats: 12–1,000 st
Stone (st)	Carats (ct)
12 st	381,017.59 ct
15 st	476,271.99 ct
20 st	635,029.32 ct
25 st	793,786.65 ct
30 st	952,543.98 ct
40 st	1,270,058.6 ct
50 st	1,587,573.3 ct
75 st	2,381,359.9 ct
100 st	3,175,146.6 ct
250 st	7,937,866.5 ct
500 st	15,875,733 ct
1,000 st	31,751,466 ct

About the units

Stone (st)

Fourteen pounds (6.35029318 kg). Body weight in the UK and Ireland is often quoted in stones and pounds.

Carat (ct)

The metric carat is exactly 200 mg and is used to weigh gemstones. (Karat, a gold-purity scale, is a different thing.) One carat equals 0.0002 kilograms (kg).

Frequently asked questions

How many carats are in one stone?

There are 31,751.4659 carats in one stone, and this value is exact by definition.

How do I convert stone to carats?

Multiply the number of stone by 31,751.4659. For example, 10 st × 31,751.4659 = 317,514.659 ct.

How many stone are in one carat?

One carat equals 0.00003149460888 stone. That is the reverse factor, 1 ÷ 31,751.4659.

What is 10 stone in carats?

10 st = 317,514.659 ct.

Is this st to ct converter accurate?

Yes. Both units are defined exactly in terms of SI units, so the conversion factor is exact; results are shown to 12 significant figures by default and you can change precision in the converter. Calculations run in your browser using the same tested engine that generated this page.

Stone to Carats Converter