A grain is exactly 64.79891 milligrams.
Grains to Centigrams Converter — gr to cg
Convert Grain (gr) to Centigram (cg) using the exact conversion factor (1 grain = 6.479891 centigram). See the formula, worked examples, and conversion table.
Grains to Centigrams converter
Converter
Mass/Weight Converter
Convert SI mass, imperial weight, jewelry, atomic, and astronomy mass units.
Context values
Some unit families need one extra value for a physically accurate result.
Centigram is 0.01 gram units.
Result = input x 6.479891e-5 / 1e-5.
Mass uses the kilogram as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Grains to Centigrams
Weight conversions between Grain and Centigram come up constantly in everyday commerce, shipping, and cooking, since US packaging is usually labeled in pounds while most of the rest of the world uses kilograms. Specifically: A grain is exactly 64.79891 milligrams, and centigram is 0.01 gram units.
Formula
centigrams = grains × 6.479891
This factor comes from each unit's defined relationship to the category's base unit: 1 grain equals 0.00006479891 base units, and 1 centigram equals 0.00001 base units, so dividing one by the other gives the direct grain-to-centigram factor of 6.479891.
Simple example
1 gr × 6.479891 = 6.479891 cg
1 grain = 6.479891 centigrams.
Real-world example
50 gr × 6.479891 = 323.99455 cg
50 grains = 323.99455 centigrams.
Conversion table
| Grain (gr) | Centigram (cg) |
|---|---|
| 1 gr | 6.479891 cg |
| 5 gr | 32.399455 cg |
| 10 gr | 64.79891 cg |
| 25 gr | 161.997275 cg |
| 50 gr | 323.99455 cg |
| 100 gr | 647.9891 cg |
Reverse conversion: Centigram to Grain
6.479891 cg × 0.1543235835 = 1 gr
6.479891 centigrams = 1 grains.
grains = centigrams × 0.154323583529
For a page dedicated to this direction, see Centigram to Grain.
Understanding the Grain (gr)
A grain is exactly 64.79891 milligrams.
Understanding the Centigram (cg)
Centigram is 0.01 gram units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many centigrams are in 1 grain?
1 grain equals 6.479891 centigrams, using the exact defined conversion factor rather than an estimate.
How do I convert grain to centigram?
Multiply the grain value by 6.479891. The converter above does this instantly to whatever precision you set.
How do I convert centigram back to grain?
Use the reverse factor: 1 centigram equals 0.1543235835 grains. You can also use the swap control in the converter above to flip the direction instantly.
What is a grain?
Grain (gr) is a unit of mass/weight.
What is a centigram?
Centigram (cg) is a unit of mass/weight.
Is the grain to centigram conversion exact?
Yes. Both grain and centigram are defined by fixed standards rather than physical artifacts, so the factor of 6.479891 used above is exact to as many digits as you choose to display.