Convert Stone to Carats
1 stone is 31,751.47 ct. One stone is exactly 31751.4659 carats.
One stone is 31751.466 carats. To convert stone to carats, multiply by 31751.466; to go the other way, divide by 31751.466 or multiply by 3.1495 × 10^-5. The relation is exact but the figure is not: it is a rounding of a number that does not terminate, and it follows from NIST Handbook 44. Fourteen pounds.
Factor checked against the defining standard · How we check
- Stone × 31751.466
1 * 31751.46631,751.466 ct
1 stone in every weight unit
| Unit | Value | Exact factor |
|---|---|---|
| ounces | 224 oz | × 224 |
| pounds | 14 lb | × 14 |
| stone (as entered) | 1 st | — |
| US tons | 0.007 ton | × 0.007 |
| micrograms | 6,350,293,180 mcg | × 6,350,293,180 |
| milligrams | 6,350,293.18 mg | × 6,350,293.18 |
| centigrams | 635,029.318 cg | × 635,029.318 |
| grams | 6,350.29318 g | × 6,350.29318 |
| kilograms | 6.35029318 kg | × 6.35029318 |
| slugs | 0.4351333024 slug | × 0.435133302402 |
| tonnes | 0.00635029318 t | × 0.00635029318 |
| carats | 31,751.4659 ct | × 31,751.4659 |
| troy ounces | 204.1666667 ozt | × 204.166666667 |
| grains | 98,000 gr | × 98,000 |
| long tons | 0.00625 LT | × 0.00625 |
Factors are entered by hand from NIST Handbook 44 rather than derived from a units library, so the ones that terminate are exact rather than rounded.
How do you convert stone to carats? The converter and the working
- 1.Take the measurement in stone.
- 2.Multiply by 31751.466 — that is how many carats fit in one stone.
- 3.To go back the other way, divide by 31751.466, or multiply by 3.1495 × 10^-5.
Worked example: 25 stone to carats
- Formula
- st × 31751.466 = ct
- Arithmetic
- 25 × 31751.466 = 793,786.65 ct
- Answer
- 25 st = 793,786.65 ct
The factor is rounded for display; the figure above is computed from the full value.
Stone to carats conversion table
| Stone | Carats |
|---|---|
| 1 st | 31,751.47 ct |
| 2 st | 63,502.93 ct |
| 3 st | 95,254.4 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 |
| 12 st | 381,017.59 ct |
| 15 st | 476,271.99 ct |
| 20 st | 635,029.32 ct |
| 25 st | 793,786.65 ct |
| 50 st | 1,587,573.3 ct |
| 100 st | 3,175,146.59 ct |
| 200 st | 6,350,293.18 ct |
| 300 st | 9,525,439.77 ct |
| 500 st | 15,875,732.95 ct |
| 1000 st | 31,751,465.9 ct |
| 2000 st | 63,502,931.8 ct |
| 5000 st | 158,757,329.5 ct |
| 10000 st | 317,514,659 ct |
What is a stone?
Fourteen pounds. Still the everyday unit of body weight in Britain and Ireland, and nowhere else.
What is a carat?
Exactly 200 milligrams, fixed by international agreement in 1907 after centuries of local carats. It weighs a gemstone; the karat that grades gold is a different word for a different thing — purity in twenty-fourths.
How many carats are in a stone?
One stone is 31751.466 carats. Going the other way, one carat is 3.1495 × 10^-5 stone. Both figures come from the same defined relation rather than from a measurement, which is why they are the same today as they were in 1959.
Every weight unit here
The whole group — 15 units with their symbols and the size of each one in kilograms — is on the conversion index, along with every pair it makes. The table above already gives each of them relative to a stone.
Cite this page
- APA
- Rule Calculator. (2026). Convert Stone to carats. Rule Calculator. https://rulecalculators.com/convert/stone-to-carat
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- Chicago
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Questions people actually ask
- How many carats are in a stone?
- 31751.466. Exactly 200 milligrams, fixed by international agreement in 1907 after centuries of local carats. It weighs a gemstone; the karat that grades gold is a different word for a different thing — purity in twenty-fourths.
- How do I convert carats back to stone?
- Divide by 31751.466, or multiply by 3.1495 × 10^-5 — they are the same operation.
Other weight conversions
Carats to stone — the same conversion the other way.