Mass per volume density.
Micrograms per Imperial gallon to Grains per Gallon Converter — ug/imp gal to gr/gal
Convert Microgram per Imperial gallon (ug/imp gal) to Grain per Gallon (gr/gal) using the exact conversion factor (1 microgram per imperial gallon = 0.0000128501 grain per gallon). See the formula, worked examples, and conversion table.
Micrograms per Imperial gallon to Grains per Gallon converter
Converter
Density Converter
Convert thousands of mass-per-volume density combinations for science, engineering, agriculture, and fluids.
Context values
Some unit families need one extra value for a physically accurate result.
Mass per volume density.
Result = input x 2.19969248e-7 / 0.01711806105.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Micrograms per Imperial gallon to Grains per Gallon
Microgram per Imperial gallon and Grain per Gallon both measure density — mass per unit volume — a property used to identify materials, check manufacturing quality, and predict whether something floats or sinks. As a fixed reference point, water has a density of exactly 1000 kg/m³ (1 g/cm³, 1 g/mL) at its temperature of maximum density, which is why many density figures in science and engineering are quoted relative to water. Both are mass per volume density units.
Formula
grains per gallon = micrograms per imperial gallon × 0.0000128501264084
This factor comes from each unit's defined relationship to the category's base unit: 1 microgram per imperial gallon equals 2.199692e-7 base units, and 1 grain per gallon equals 0.0171180610453 base units, so dividing one by the other gives the direct microgram per imperial gallon-to-grain per gallon factor of 0.0000128501264084.
Simple example
1 ug/imp gal × 0.00001285012641 = 0.0000128501 gr/gal
1 microgram per imperial gallon = 0.0000128501 grains per gallon.
Real-world example
1,000 ug/imp gal × 0.00001285012641 = 0.0128501264 gr/gal
1,000 micrograms per imperial gallon = 0.0128501264 grains per gallon.
Conversion table
| Microgram per Imperial gallon (ug/imp gal) | Grain per Gallon (gr/gal) |
|---|---|
| 0.1 ug/imp gal | 0.000001285 gr/gal |
| 1 ug/imp gal | 0.0000128501 gr/gal |
| 10 ug/imp gal | 0.0001285013 gr/gal |
| 100 ug/imp gal | 0.0012850126 gr/gal |
| 1,000 ug/imp gal | 0.0128501264 gr/gal |
| 10,000 ug/imp gal | 0.1285012641 gr/gal |
Reverse conversion: Grain per Gallon to Microgram per Imperial gallon
0.0000128501 gr/gal × 77820.24614 = 0.9999979449 ug/imp gal
0.0000128501 grains per gallon = 0.9999979449 micrograms per imperial gallon.
micrograms per imperial gallon = grains per gallon × 77820.2461373
For a page dedicated to this direction, see Grain per Gallon to Microgram per Imperial gallon.
Understanding the Microgram per Imperial gallon (ug/imp gal)
Mass per volume density.
Understanding the Grain per Gallon (gr/gal)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many grains per gallon are in 1 microgram per imperial gallon?
1 microgram per imperial gallon equals 0.0000128501 grains per gallon, using the exact defined conversion factor rather than an estimate.
How do I convert microgram per imperial gallon to grain per gallon?
Multiply the microgram per imperial gallon value by 0.00001285012641. The converter above does this instantly to whatever precision you set.
How do I convert grain per gallon back to microgram per imperial gallon?
Use the reverse factor: 1 grain per gallon equals 77,820.24614 micrograms per imperial gallon. You can also use the swap control in the converter above to flip the direction instantly.
What is a microgram per imperial gallon?
Microgram per Imperial gallon (ug/imp gal) is a unit of density.
What is a grain per gallon?
Grain per Gallon (gr/gal) is a unit of density.
Is the microgram per imperial gallon to grain per gallon conversion exact?
Yes. Both microgram per imperial gallon and grain per gallon are defined by fixed standards rather than physical artifacts, so the factor of 0.00001285012641 used above is exact to as many digits as you choose to display.
What's the difference between density and mass concentration?
Density is the mass of a pure substance or material per unit volume. Mass concentration is the mass of one component — like a dissolved solute — within a mixture's total volume. The two use the same kind of units but describe different physical situations.