carat → stone | Converter
Convert carat to stone with the formula below. 1 ct ≈ 0.0000314946088836 st
Quick Insight
1 carat = 0.000031494609 stone
0.5 ct ≈ 0.0000157473044418 st; 2.5 ct ≈ 0.0000787365222089 st
Rounded factors
Relative rounding difference; not measurement uncertainty.
Visual Comparisons
Mathematical Facts
Convert carat to stone with the formula below. st ≈ ct × 0.0000314946088836. 1 ct ≈ 0.0002 kg; 1 st ≈ 6.35029318 kg The metric carat describes gemstone mass and equals 200 milligrams. A mass conversion does not establish a stone’s dimensions or material. A stone is a mass unit of 14 avoirdupois pounds. The result here is decimal stone, not a separate stone-and-pound pair.
Why This Conversion Matters
Use this pair to compare a gemstone mass record with another mass unit. The calculation concerns the amount of material, not the stone’s diameter or a metal’s purity. Exact unit relationships: 1 ct = 200 mg; 1 st = 14 lb. The calculator uses the full stored factor and rounds displayed results to 12 significant digits. Display precision is not a guarantee of measurement accuracy.
Real-World Examples
Gemstone mass records
The metric carat describes gemstone mass and equals 200 milligrams. A mass conversion does not establish a stone’s dimensions or material. Use this pair to compare a gemstone mass record with another mass unit. The calculation concerns the amount of material, not the stone’s diameter or a metal’s purity. The examples below are illustrative recorded masses, not standard product sizes or prescribed quantities.
Examples:
- Recorded gemstone mass: 0.5 ct ≈ 0.0000157473044418 st
- Recorded gemstone mass: 2.5 ct ≈ 0.0000787365222089 st
Pro Tips:
- ✓Confirm that the starting number is a measured mass; for carats use 200 mg per ct and keep any purity description separate.
Quick Reference Table
| carats | stones |
|---|---|
| 10 ct | 0.000314946088836 st |
| 50 ct | 0.00157473044418 st |
| 100 ct | 0.00314946088836 st |
| 500 ct | 0.0157473044418 st |
| 1,000 ct | 0.0314946088836 st |
Formula: st = ct × conversion factor
Common Mistakes to Avoid
Entering a purity rating as though it were a mass in carats
The metric carat is 0.2 g. A purity description is a different kind of quantity, so a mass factor cannot convert it.
✓ Confirm that the starting number is a measured mass; for carats use 200 mg per ct and keep any purity description separate. 0.5 ct ≈ 0.0000157473044418 st.
Pro Tips
- ✓Use ct for mass; a metal-purity karat rating is not a mass value that this converter can transform.
- ✓For mixed notation, multiply the fractional stone by 14: 2.5 st means 2 st 7 lb.
- ✓Confirm that the starting number is a measured mass; for carats use 200 mg per ct and keep any purity description separate.
Frequently Asked Questions
How do I calculate the conversion?
st ≈ ct × 0.0000314946088836. 1 ct ≈ 0.0002 kg; 1 st ≈ 6.35029318 kg
What is an example?
1 ct ≈ 0.0000314946088836 st; 10 ct ≈ 0.000314946088836 st; 100 ct ≈ 0.00314946088836 st
Which definitions apply to this pair? (carat → stone)
1 ct = 200 mg; 1 st = 14 lb. Use ct for mass; a metal-purity karat rating is not a mass value that this converter can transform. For mixed notation, multiply the fractional stone by 14: 2.5 st means 2 st 7 lb.
What is the main interpretation mistake to avoid?
The metric carat is 0.2 g. A purity description is a different kind of quantity, so a mass factor cannot convert it. Confirm that the starting number is a measured mass; for carats use 200 mg per ct and keep any purity description separate.
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