Carats to stone
1 carat in stone
1 ct = 0.00003149 st
st = ct × 0.000031494609
To convert carats to stone, multiply by 0.000031494609. The table below gives the values people look up most often, and the converter works for any number.
Carats to stone table
| Carats | Stone |
|---|---|
| 1 ct | 0.00003149 |
| 2 ct | 0.00006299 |
| 3 ct | 0.00009448 |
| 4 ct | 0.000126 |
| 5 ct | 0.0001575 |
| 10 ct | 0.0003149 |
| 15 ct | 0.0004724 |
| 20 ct | 0.0006299 |
| 25 ct | 0.0007874 |
| 30 ct | 0.0009448 |
| 40 ct | 0.0012598 |
| 50 ct | 0.0015747 |
| 75 ct | 0.0023621 |
| 100 ct | 0.0031495 |
| 250 ct | 0.0078737 |
| 500 ct | 0.015747 |
| 1,000 ct | 0.031495 |
How the conversion works
The relationship is st = ct × 0.000031494609. 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 stone are in one carat?
- One carat equals 0.00003149 stone. st = ct × 0.000031494609.
- How do you convert carats to stone?
- Use st = ct × 0.000031494609. So 10 ct is 0.0003149 st.
- How many carats are in one stone?
- One stone equals 31,751.466 carats, which is the reverse of the conversion above.
Related pages
Sources
- Guide for the Use of the International System of Units (SP 811) — NIST (Public domain (US Government))
- The International System of Units (SI Brochure) — Bureau International des Poids et Mesures
- Calculated on this page — At One Place