Table Of Contents
Grain to carat Conversion
1 grain (gr) is equal to 0.32399455 carat (CD).
1 gr = 0.32399455 CD
or
1 CD = 3.086471671 gr
Formula
To convert a mass from grain (gr) to carat (CD), divide the mass in grain by 3.086471671
m(CD) = m(gr) / 3.086471671
Examples:
Convert 100 grain to carat:
m(CD) = 100gr / 3.086471671 = 32.399455 CD
Conversion table
| Grain (gr) | Carat (CD) |
|---|---|
| 1 gr | 0.32399455 CD |
| 2 gr | 0.6479891 CD |
| 3 gr | 0.97198365 CD |
| 5 gr | 1.61997275 CD |
| 10 gr | 3.2399455 CD |
| 20 gr | 6.479891 CD |
| 25 gr | 8.09986375 CD |
| 50 gr | 16.1997275 CD |
| 100 gr | 32.399455 CD |
| 250 gr | 80.9986375 CD |
| 500 gr | 161.997275 CD |
| 1000 gr | 323.99455 CD |
| Carat (CD) | Grain (gr) |
|---|---|
| 1 CD | 3.086471671 gr |
| 2 CD | 6.172943341 gr |
| 3 CD | 9.259415012 gr |
| 5 CD | 15.432358353 gr |
| 10 CD | 30.864716706 gr |
| 20 CD | 61.729433412 gr |
| 25 CD | 77.161791765 gr |
| 50 CD | 154.323583529 gr |
| 100 CD | 308.647167059 gr |
| 250 CD | 771.617917647 gr |
| 500 CD | 1543.235835294 gr |
| 1000 CD | 3086.471670588 gr |
Frequently asked questions
How do I convert grain to carat?
Divide the value in grain by 3.086471671 to get the result in carat. For example, 5 gr ÷ 3.086471671 = 1.61997275 CD.
How many carat are in 1 grain?
1 grain (gr) is equal to 0.32399455 carat (CD).
How do I convert carat back to grain?
Use the inverse operation: multiply the value in carat by 3.086471671 to get the result in grain.
How accurate is the grain to carat conversion?
The converter multiplies by the conversion factor 3.086471671 and rounds the result to 9 decimal places by default. You can increase or reduce the precision with the digits option on this page.
Sources
Conversion factors are based on internationally recognised standards:
- BIPM — The International System of Units (SI Brochure, 9th edition)
- ISO 80000-4:2019 — Quantities and units — Part 4: Mechanics
- NIST Handbook 44, Appendix C — General Tables of Units of Measurement (current edition)
- NIST Guide to the SI (SP 811), Appendix B.9: Factors for units listed by kind of quantity or field of science
- Circular of the Bureau of Standards No. 43: The Metric Carat (1st edition, issued November 1, 1913)