Grains to Centigrams (gr to cg) Converter
1 Grain equals 6.4799 Centigrams (1 gr = 6.4799 cg). Convert Grains to Centigrams with formula, table, and examples.
One grain equals approximately 6.480 centigrams. The grain (64.80 mg) is 6.48 times heavier than a centigram (10 mg). Both units occupy the small-mass end of their respective systems, but the grain remains actively used in ammunition manufacturing while the centigram has been sidelined by the milligram. Their conversion is most relevant when translating grain-based ammunition data to metric scales.
How to Convert Grains to Centigrams
- Take your value in Grains
- Multiply by 6.479891
- Read the result in Centigrams
Common Grains to Centigrams Conversions
| Grains (gr) | Centigrams (cg) | Status |
|---|---|---|
| 1 gr | 6.4799 cg | |
| 5 gr | 32.3995 cg | |
| 10 gr | 64.7989 cg | |
| 15 gr | 97.1984 cg | |
| 20 gr | 129.5978 cg | |
| 50 gr | 323.9946 cg | |
| 100 gr | 647.9891 cg | |
| 200 gr | 1,295.9782 cg | |
| 437.5 gr | 2,834.9523 cg | |
| 480 gr | 3,110.3477 cg | |
| 500 gr | 3,239.9455 cg | |
| 1,000 gr | 6,479.891 cg | |
| 5,000 gr | 32,399.455 cg | |
| 7,000 gr | 45,359.237 cg |
Good to Know About Grains to Centigrams Conversion
The grain is one of the oldest weight units still in active professional use. Its origins trace to ancient Mesopotamia, where barley grains served as the basis for weight standards. Through Egypt, Greece, Rome, and medieval England, the grain evolved but retained its fundamental nature: the weight of a single seed. Today it measures bullet weights and powder charges, a journey from agriculture to ballistics spanning 5,000 years.
Grains to Centigrams: What You Need to Know
A standard 5-grain aspirin tablet weighs 32.4 centigrams. A 55-grain .223 Remington bullet weighs 356.4 centigrams. When handloaders work with metric-only scales, converting from grain specifications to centigram readings requires this factor. Most reloading manuals specify charges in grains, but some international equipment displays only metric units.
What is a Grain? gr
A grain is a unit of mass equal to exactly 64.79891 milligrams. It is the same in the avoirdupois, troy, and apothecaries' systems, derived from the 1959 international agreement defining the pound as exactly 0.45359237 kilograms.
Learn more about Grain →What is a Centigram? cg
A centigram is one hundredth of a gram. It is a metric unit rarely used in everyday life but appears in some scientific and educational contexts.
Learn more about Centigram →Going the other way? Use our Centigrams to Grains converter.
Grains to Centigrams FAQ
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One grain equals approximately 6.480 centigrams. This comes from 1 grain = 64.80 mg and 1 centigram = 10 mg: 64.80 / 10 = 6.480.
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Not typically. Ammunition specifications use grains, and metric scales display in grams or milligrams. The centigram sits between these in a range nobody targets. Reloaders who need metric conversion go directly from grains to grams or milligrams.
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Yes. Since 1959, one grain has been defined as exactly 64.79891 milligrams. This makes the grain a precisely metric-derived unit, even though it is used in imperial contexts.
Non-Frequently Asked Questions About Grains to Centigrams
Questions nobody should ask - but someone did.
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150 grains equals about 972 centigrams (9.72 grams). But bullets are not pure lead - modern bullets use copper jackets over lead cores, sometimes with steel or other metals. The grain specification refers to total bullet weight regardless of composition. Nobody specifies bullet metallurgy in centigrams.
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One centigram (10 mg) is about 0.154 grains. Elite competitive shooters sort bullets by weight to within 0.1 to 0.3 grains (roughly 1 to 2 centigrams). So yes, a centigram variation could affect group size at long range. Competitive shooting operates at a level of precision where centigrams actually matter, even if nobody calls them that.
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One grain (64.8 mg) is roughly the weight of a single dry grain of rice, a small sesame seed, or about 1.3 drops of water. The name 'grain' derives from the weight of a cereal grain - and remarkably, actual wheat and barley grains do weigh roughly 40 to 65 milligrams, so the etymology is surprisingly literal.
Related Articles About Grains to Centigrams
Need the reverse? Use our Centigrams to Grains converter. See all Weight & Mass converters.