A grain is exactly 64.79891 milligrams.
Grains to Slugs Converter — gr to slug
Convert Grain (gr) to Slug (slug) using the exact conversion factor (1 grain = 0.0000044401 slug). See the formula, worked examples, and conversion table.
Grains to Slugs 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.
A slug is an imperial mass unit.
Result = input x 6.479891e-5 / 14.59390294.
Mass uses the kilogram as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Grains to Slugs
Weight conversions between Grain and Slug 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 a slug is an imperial mass unit.
Formula
slugs = grains × 0.0000044401357388
This factor comes from each unit's defined relationship to the category's base unit: 1 grain equals 0.00006479891 base units, and 1 slug equals 14.5939029372 base units, so dividing one by the other gives the direct grain-to-slug factor of 0.0000044401357388.
Simple example
1 gr × 0.000004440135739 = 0.0000044401 slug
1 grain = 0.0000044401 slugs.
Real-world example
50 gr × 0.000004440135739 = 0.0002220068 slug
50 grains = 0.0002220068 slugs.
Conversion table
| Grain (gr) | Slug (slug) |
|---|---|
| 1 gr | 0.0000044401 slug |
| 5 gr | 0.0000222007 slug |
| 10 gr | 0.0000444014 slug |
| 25 gr | 0.0001110034 slug |
| 50 gr | 0.0002220068 slug |
| 100 gr | 0.0004440136 slug |
Reverse conversion: Slug to Grain
0.0000044401 slug × 225218.3399 = 0.999991951 gr
0.0000044401 slugs = 0.999991951 grains.
grains = slugs × 225218.339895
For a page dedicated to this direction, see Slug to Grain.
Understanding the Grain (gr)
A grain is exactly 64.79891 milligrams.
Understanding the Slug (slug)
A slug is an imperial mass unit.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many slugs are in 1 grain?
1 grain equals 0.0000044401 slugs, using the exact defined conversion factor rather than an estimate.
How do I convert grain to slug?
Multiply the grain value by 0.000004440135739. The converter above does this instantly to whatever precision you set.
How do I convert slug back to grain?
Use the reverse factor: 1 slug equals 225,218.3399 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 slug?
Slug (slug) is a unit of mass/weight.
Is the grain to slug conversion exact?
Yes. Both grain and slug are defined by fixed standards rather than physical artifacts, so the factor of 0.000004440135739 used above is exact to as many digits as you choose to display.