Mass per volume density.
Micrograms per Imperial gallon to Grains per Quart Converter — ug/imp gal to gr/qt
Convert Microgram per Imperial gallon (ug/imp gal) to Grain per Quart (gr/qt) using the exact conversion factor (1 microgram per imperial gallon = 0.0000032125 grain per quart). See the formula, worked examples, and conversion table.
Micrograms per Imperial gallon to Grains per Quart 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 / 0.06847224418.
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 Quart
Microgram per Imperial gallon and Grain per Quart 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 quart = micrograms per imperial gallon × 0.00000321253160211
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 quart equals 0.0684722441811 base units, so dividing one by the other gives the direct microgram per imperial gallon-to-grain per quart factor of 0.00000321253160211.
Simple example
1 ug/imp gal × 0.000003212531602 = 0.0000032125 gr/qt
1 microgram per imperial gallon = 0.0000032125 grains per quart.
Real-world example
1,000 ug/imp gal × 0.000003212531602 = 0.0032125316 gr/qt
1,000 micrograms per imperial gallon = 0.0032125316 grains per quart.
Conversion table
| Microgram per Imperial gallon (ug/imp gal) | Grain per Quart (gr/qt) |
|---|---|
| 0.1 ug/imp gal | 3.212532e-7 gr/qt |
| 1 ug/imp gal | 0.0000032125 gr/qt |
| 10 ug/imp gal | 0.0000321253 gr/qt |
| 100 ug/imp gal | 0.0003212532 gr/qt |
| 1,000 ug/imp gal | 0.0032125316 gr/qt |
| 10,000 ug/imp gal | 0.032125316 gr/qt |
Reverse conversion: Grain per Quart to Microgram per Imperial gallon
0.0000032125 gr/qt × 311280.9845 = 0.9999901629 ug/imp gal
0.0000032125 grains per quart = 0.9999901629 micrograms per imperial gallon.
micrograms per imperial gallon = grains per quart × 311280.984549
For a page dedicated to this direction, see Grain per Quart to Microgram per Imperial gallon.
Understanding the Microgram per Imperial gallon (ug/imp gal)
Mass per volume density.
Understanding the Grain per Quart (gr/qt)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many grains per quart are in 1 microgram per imperial gallon?
1 microgram per imperial gallon equals 0.0000032125 grains per quart, using the exact defined conversion factor rather than an estimate.
How do I convert microgram per imperial gallon to grain per quart?
Multiply the microgram per imperial gallon value by 0.000003212531602. The converter above does this instantly to whatever precision you set.
How do I convert grain per quart back to microgram per imperial gallon?
Use the reverse factor: 1 grain per quart equals 311,280.9845 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 quart?
Grain per Quart (gr/qt) is a unit of density.
Is the microgram per imperial gallon to grain per quart conversion exact?
Yes. Both microgram per imperial gallon and grain per quart are defined by fixed standards rather than physical artifacts, so the factor of 0.000003212531602 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.