At One Place

Stone to carats

1 stone in carats
1 st = 31,751.466 ct
ct = st × 31,751.4659

To convert stone to carats, multiply by 31,751.4659. The table below gives the values people look up most often, and the converter works for any number.

Stone to carats table

Common stone values converted to carats.
Stone Carats
1 st 31,751.466
2 st 63,502.932
3 st 95,254.398
4 st 127,005.86
5 st 158,757.33
10 st 317,514.66
15 st 476,271.99
20 st 635,029.32
25 st 793,786.65
30 st 952,543.98
40 st 1,270,058.6
50 st 1,587,573.3
75 st 2,381,359.9
100 st 3,175,146.6
250 st 7,937,866.5
500 st 15,875,733
1,000 st 31,751,466

How the conversion works

The relationship is ct = st × 31,751.4659. Both units measure mass, so the conversion is a fixed factor that never changes. The figure is exact rather than approximate: since the international yard and pound agreement of 1959, an inch is defined as exactly 25.4 millimetres and a pound as exactly 0.45359237 kilograms, and every other imperial and US customary unit here is derived from those two.

Common questions

How many carats are in one stone?
One stone equals 31,751.466 carats. ct = st × 31,751.4659.
How do you convert stone to carats?
Use ct = st × 31,751.4659. So 10 st is 317,514.66 ct.
How many stone are in one carat?
One carat equals 0.00003149 stone, which is the reverse of the conversion above.

Related pages

Sources

  1. Guide for the Use of the International System of Units (SP 811) — NIST (Public domain (US Government))
  2. The International System of Units (SI Brochure) — Bureau International des Poids et Mesures
  3. Calculated on this page — At One Place

How these figures are compiled and checked