Density and Mass
cttogr
Convert metric carats (ct) to grains (gr).
Factor1 ct = 3.086472 gr
Converter
ct
Accepts numbers or expressions, e.g. 150 + 14.7
Result
gr
Rendered to 6 significant figures.
Formula
Formula
gr = ct × 3.086472
Multiply any value in metric carats by 3.086472 to obtain the value in grains.
Worked example
Convert 100 ct to gr.
- 01Start with 100 ct.
- 02Multiply by the conversion factor: 100 × 3.086472 = 308.647 gr.
Result100 ct = 308.647 gr
Conversion table
| ct | gr |
|---|---|
| 1 | 3.0865 |
| 2 | 6.1729 |
| 5 | 15.432 |
| 10 | 30.865 |
| 20 | 61.729 |
| 50 | 154.32 |
| 100 | 308.65 |
| 200 | 617.29 |
| 500 | 1543.2 |
| 1000 | 3086.5 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from ct to gr?
1 ct equals 3.086472 gr. To convert, multiply the value in metric carats by 3.086472.
How do I convert 1 ct to gr?
1 ct = 3.08647 gr. For any value, multiply by 3.086472.
How do I convert gr back to ct?
Divide by the same factor — or equivalently, multiply by 0.3239945. So 1 gr = 0.323995 ct.
When would I need to convert metric carat to grain (troy/apothecary)?
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).