Mass per volume density.
Milligrams per Fluid ounce to Grains per Quart Converter — mg/fl oz to gr/qt
Convert Milligram per Fluid ounce (mg/fl oz) to Grain per Quart (gr/qt) using the exact conversion factor (1 milligram per fluid ounce = 0.4938354673 grain per quart). See the formula, worked examples, and conversion table.
Milligrams per Fluid ounce 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 0.0338140227 / 0.06847224418.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Milligrams per Fluid ounce to Grains per Quart
Milligram per Fluid ounce 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 = milligrams per fluid ounce × 0.493835467294
This factor comes from each unit's defined relationship to the category's base unit: 1 milligram per fluid ounce equals 0.0338140227018 base units, and 1 grain per quart equals 0.0684722441811 base units, so dividing one by the other gives the direct milligram per fluid ounce-to-grain per quart factor of 0.493835467294.
Simple example
1 mg/fl oz × 0.4938354673 = 0.4938354673 gr/qt
1 milligram per fluid ounce = 0.4938354673 grains per quart.
Real-world example
1,000 mg/fl oz × 0.4938354673 = 493.8354673 gr/qt
1,000 milligrams per fluid ounce = 493.8354673 grains per quart.
Conversion table
| Milligram per Fluid ounce (mg/fl oz) | Grain per Quart (gr/qt) |
|---|---|
| 0.1 mg/fl oz | 0.0493835467 gr/qt |
| 1 mg/fl oz | 0.4938354673 gr/qt |
| 10 mg/fl oz | 4.938354673 gr/qt |
| 100 mg/fl oz | 49.38354673 gr/qt |
| 1,000 mg/fl oz | 493.8354673 gr/qt |
| 10,000 mg/fl oz | 4,938.354673 gr/qt |
Reverse conversion: Grain per Quart to Milligram per Fluid ounce
0.4938354673 gr/qt × 2.024965937 = 1 mg/fl oz
0.4938354673 grains per quart = 1 milligrams per fluid ounce.
milligrams per fluid ounce = grains per quart × 2.0249659375
For a page dedicated to this direction, see Grain per Quart to Milligram per Fluid ounce.
Understanding the Milligram per Fluid ounce (mg/fl oz)
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 milligram per fluid ounce?
1 milligram per fluid ounce equals 0.4938354673 grains per quart, using the exact defined conversion factor rather than an estimate.
How do I convert milligram per fluid ounce to grain per quart?
Multiply the milligram per fluid ounce value by 0.4938354673. The converter above does this instantly to whatever precision you set.
How do I convert grain per quart back to milligram per fluid ounce?
Use the reverse factor: 1 grain per quart equals 2.024965937 milligrams per fluid ounce. You can also use the swap control in the converter above to flip the direction instantly.
What is a milligram per fluid ounce?
Milligram per Fluid ounce (mg/fl oz) is a unit of density.
What is a grain per quart?
Grain per Quart (gr/qt) is a unit of density.
Is the milligram per fluid ounce to grain per quart conversion exact?
Yes. Both milligram per fluid ounce and grain per quart are defined by fixed standards rather than physical artifacts, so the factor of 0.4938354673 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.