Density and Mass
cttost
Convert metric carats (ct) to stones (st).
Factor1 ct = 3.149462e-5 st
Converter
ct
Accepts numbers or expressions, e.g. 150 + 14.7
Result
st
Rendered to 6 significant figures.
Formula
Formula
st = ct × 3.149462e-5
Multiply any value in metric carats by 3.149462e-5 to obtain the value in stones.
Worked example
Convert 100000 ct to st.
- 01Start with 100000 ct.
- 02Multiply by the conversion factor: 100000 × 3.149462e-5 = 3.14946 st.
Result100000 ct = 3.14946 st
Conversion table
| ct | st |
|---|---|
| 1 | 3.1495e-5 |
| 2 | 6.2989e-5 |
| 5 | 0.00015747 |
| 10 | 0.00031495 |
| 20 | 0.00062989 |
| 50 | 0.0015747 |
| 100 | 0.0031495 |
| 200 | 0.0062989 |
| 500 | 0.015747 |
| 1000 | 0.031495 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from ct to st?
1 ct equals 3.149462e-5 st. To convert, multiply the value in metric carats by 3.149462e-5.
How do I convert 1 ct to st?
1 ct = 3.14946e-5 st. For any value, multiply by 3.149462e-5.
How do I convert st back to ct?
Divide by the same factor — or equivalently, multiply by 31751.45. So 1 st = 31751.4 ct.
When would I need to convert metric carat to stone (UK avoirdupois)?
Mass conversions appear in material balances, reagent dosing, and reconciling vendor specifications across imperial/metric systems.
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).