Microgram is 0.000001 gram units.
Micrograms to Grains Converter — ug to gr
Convert Microgram (ug) to Grain (gr) using the exact conversion factor (1 microgram = 0.0000154324 grain). See the formula, worked examples, and conversion table.
Micrograms to Grains 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 grain is exactly 64.79891 milligrams.
Result = input x 1e-9 / 6.479891e-5.
Mass uses the kilogram as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Micrograms to Grains
Weight conversions between Microgram and Grain 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: Microgram is 0.000001 gram units, and a grain is exactly 64.79891 milligrams.
Formula
grains = micrograms × 0.0000154323583529
This factor comes from each unit's defined relationship to the category's base unit: 1 microgram equals 1e-9 base units, and 1 grain equals 0.00006479891 base units, so dividing one by the other gives the direct microgram-to-grain factor of 0.0000154323583529.
Simple example
1 ug × 0.00001543235835 = 0.0000154324 gr
1 microgram = 0.0000154324 grains.
Real-world example
50 ug × 0.00001543235835 = 0.0007716179 gr
50 micrograms = 0.0007716179 grains.
Conversion table
| Microgram (ug) | Grain (gr) |
|---|---|
| 1 ug | 0.0000154324 gr |
| 5 ug | 0.0000771618 gr |
| 10 ug | 0.0001543236 gr |
| 25 ug | 0.000385809 gr |
| 50 ug | 0.0007716179 gr |
| 100 ug | 0.0015432358 gr |
Reverse conversion: Grain to Microgram
0.0000154324 gr × 64798.91 = 1.000002699 ug
0.0000154324 grains = 1.000002699 micrograms.
micrograms = grains × 64798.91
For a page dedicated to this direction, see Grain to Microgram.
Understanding the Microgram (ug)
Microgram is 0.000001 gram units.
Understanding the Grain (gr)
A grain is exactly 64.79891 milligrams.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many grains are in 1 microgram?
1 microgram equals 0.0000154324 grains, using the exact defined conversion factor rather than an estimate.
How do I convert microgram to grain?
Multiply the microgram value by 0.00001543235835. The converter above does this instantly to whatever precision you set.
How do I convert grain back to microgram?
Use the reverse factor: 1 grain equals 64,798.91 micrograms. You can also use the swap control in the converter above to flip the direction instantly.
What is a microgram?
Microgram (ug) is a unit of mass/weight.
What is a grain?
Grain (gr) is a unit of mass/weight.
Is the microgram to grain conversion exact?
Yes. Both microgram and grain are defined by fixed standards rather than physical artifacts, so the factor of 0.00001543235835 used above is exact to as many digits as you choose to display.