Mass per volume density.
Grains per Imperial gallon to Milligrams per Quart Converter — gr/imp gal to mg/qt
Convert Grain per Imperial gallon (gr/imp gal) to Milligram per Quart (mg/qt) using the exact conversion factor (1 grain per imperial gallon = 13.48909489 milligram per quart). See the formula, worked examples, and conversion table.
Grains per Imperial gallon to Milligrams 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 0.01425376752 / 0.001056688209.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Grains per Imperial gallon to Milligrams per Quart
Grain per Imperial gallon and Milligram 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
milligrams per quart = grains per imperial gallon × 13.4890948873
This factor comes from each unit's defined relationship to the category's base unit: 1 grain per imperial gallon equals 0.0142537675233 base units, and 1 milligram per quart equals 0.00105668820943 base units, so dividing one by the other gives the direct grain per imperial gallon-to-milligram per quart factor of 13.4890948873.
Simple example
1 gr/imp gal × 13.48909489 = 13.48909489 mg/qt
1 grain per imperial gallon = 13.48909489 milligrams per quart.
Real-world example
1,000 gr/imp gal × 13.48909489 = 13,489.09489 mg/qt
1,000 grains per imperial gallon = 13,489.09489 milligrams per quart.
Conversion table
| Grain per Imperial gallon (gr/imp gal) | Milligram per Quart (mg/qt) |
|---|---|
| 0.1 gr/imp gal | 1.348909489 mg/qt |
| 1 gr/imp gal | 13.48909489 mg/qt |
| 10 gr/imp gal | 134.8909489 mg/qt |
| 100 gr/imp gal | 1,348.909489 mg/qt |
| 1,000 gr/imp gal | 13,489.09489 mg/qt |
| 10,000 gr/imp gal | 134,890.9489 mg/qt |
Reverse conversion: Milligram per Quart to Grain per Imperial gallon
13.48909489 mg/qt × 0.07413395846 = 1 gr/imp gal
13.48909489 milligrams per quart = 1 grains per imperial gallon.
grains per imperial gallon = milligrams per quart × 0.0741339584573
For a page dedicated to this direction, see Milligram per Quart to Grain per Imperial gallon.
Understanding the Grain per Imperial gallon (gr/imp gal)
Mass per volume density.
Understanding the Milligram per Quart (mg/qt)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many milligrams per quart are in 1 grain per imperial gallon?
1 grain per imperial gallon equals 13.48909489 milligrams per quart, using the exact defined conversion factor rather than an estimate.
How do I convert grain per imperial gallon to milligram per quart?
Multiply the grain per imperial gallon value by 13.48909489. The converter above does this instantly to whatever precision you set.
How do I convert milligram per quart back to grain per imperial gallon?
Use the reverse factor: 1 milligram per quart equals 0.0741339585 grains per imperial gallon. You can also use the swap control in the converter above to flip the direction instantly.
What is a grain per imperial gallon?
Grain per Imperial gallon (gr/imp gal) is a unit of density.
What is a milligram per quart?
Milligram per Quart (mg/qt) is a unit of density.
Is the grain per imperial gallon to milligram per quart conversion exact?
Yes. Both grain per imperial gallon and milligram per quart are defined by fixed standards rather than physical artifacts, so the factor of 13.48909489 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.