Carats to Stone Converter

1 carat (ct) equals 0.000031494609 stone (st).

Quick answer

  • 1 carat = 0.000031494609 stone
  • 1 stone = 31,751.4659 carats
  • Formula: st = ct ÷ 31,751.4659

1 carat = 0.000031494609 stone

How to convert carats to stone

st = ct ÷ 31,751.4659

To convert carats to stone, divide the number of carats by 31,751.4659.

Example: 18 ct to st

  1. Start with the value in carats: 18 ct.
  2. Divide by 31,751.4659: 18 ÷ 31,751.4659 = 0.00056690296.
  3. Result: 18 carats = 0.00056690296 stone.

Going the other way, 1 stone = 31,751.4659 carats, so to convert stone back to carats you multiply by the same number. See stone to carats.

Carats to stone conversion table

Carats (ct)Stone (st)
0.25 ct 0.000007873652 st
0.5 ct 0.000015747304 st
0.75 ct 0.000023620957 st
1 ct 0.000031494609 st
1.5 ct 0.000047241913 st
2 ct 0.000062989218 st
2.5 ct 0.000078736522 st
3 ct 0.000094483827 st
4 ct 0.000125978436 st
5 ct 0.000157473044 st
6 ct 0.000188967653 st
7 ct 0.000220462262 st
8 ct 0.000251956871 st
9 ct 0.00028345148 st
10 ct 0.000314946089 st
11 ct 0.000346440698 st
12 ct 0.000377935307 st
13 ct 0.000409429916 st
14 ct 0.000440924524 st
15 ct 0.000472419133 st
16 ct 0.000503913742 st
17 ct 0.000535408351 st
18 ct 0.00056690296 st
19 ct 0.000598397569 st
20 ct 0.000629892178 st
21 ct 0.000661386787 st
22 ct 0.000692881395 st
23 ct 0.000724376004 st
24 ct 0.000755870613 st
25 ct 0.000787365222 st
26 ct 0.000818859831 st
27 ct 0.00085035444 st
28 ct 0.000881849049 st
29 ct 0.000913343658 st
30 ct 0.000944838267 st
31 ct 0.000976332875 st
32 ct 0.001007827484 st
33 ct 0.001039322093 st
34 ct 0.001070816702 st
35 ct 0.001102311311 st

More ct to st values

What is a carat?

The carat is the unit of mass for gemstones and pearls, equal to exactly 200 milligrams.

More about carats →

What is a stone?

The stone is a British and Irish unit of mass equal to 14 pounds, about 6.35 kilograms.

More about stone →

Convert carats to other units

Convert other units to stone

Frequently asked questions

How many stone are in a carat?

One carat is 0.000031494609 stone.

How many carats are in a stone?

One stone is 31,751.4659 carats.

What is the formula to convert carats to stone?

st = ct ÷ 31,751.4659.