Mass per volume density.
Grains per Pint to Milligrams per Quart Converter — gr/pt to mg/qt
Convert Grain per Pint (gr/pt) to Milligram per Quart (mg/qt) using the exact conversion factor (1 grain per pint = 129.59782 milligram per quart). See the formula, worked examples, and conversion table.
Grains per Pint 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 0.1369444884 / 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 Pint to Milligrams per Quart
Grain per Pint 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 pint × 129.59782
This factor comes from each unit's defined relationship to the category's base unit: 1 grain per pint equals 0.136944488362 base units, and 1 milligram per quart equals 0.00105668820943 base units, so dividing one by the other gives the direct grain per pint-to-milligram per quart factor of 129.59782.
Simple example
1 gr/pt × 129.59782 = 129.59782 mg/qt
1 grain per pint = 129.59782 milligrams per quart.
Real-world example
1,000 gr/pt × 129.59782 = 129,597.82 mg/qt
1,000 grains per pint = 129,597.82 milligrams per quart.
Conversion table
| Grain per Pint (gr/pt) | Milligram per Quart (mg/qt) |
|---|---|
| 0.1 gr/pt | 12.959782 mg/qt |
| 1 gr/pt | 129.59782 mg/qt |
| 10 gr/pt | 1,295.9782 mg/qt |
| 100 gr/pt | 12,959.782 mg/qt |
| 1,000 gr/pt | 129,597.82 mg/qt |
| 10,000 gr/pt | 1,295,978.2 mg/qt |
Reverse conversion: Milligram per Quart to Grain per Pint
129.59782 mg/qt × 0.007716179176 = 1 gr/pt
129.59782 milligrams per quart = 1 grains per pint.
grains per pint = milligrams per quart × 0.00771617917647
For a page dedicated to this direction, see Milligram per Quart to Grain per Pint.
Understanding the Grain per Pint (gr/pt)
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 pint?
1 grain per pint equals 129.59782 milligrams per quart, using the exact defined conversion factor rather than an estimate.
How do I convert grain per pint to milligram per quart?
Multiply the grain per pint value by 129.59782. The converter above does this instantly to whatever precision you set.
How do I convert milligram per quart back to grain per pint?
Use the reverse factor: 1 milligram per quart equals 0.0077161792 grains per pint. You can also use the swap control in the converter above to flip the direction instantly.
What is a grain per pint?
Grain per Pint (gr/pt) 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 pint to milligram per quart conversion exact?
Yes. Both grain per pint and milligram per quart are defined by fixed standards rather than physical artifacts, so the factor of 129.59782 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.