Mass per volume density.
Grains per Quart to Micrograms per Liter Converter — gr/qt to ug/L
Convert Grain per Quart (gr/qt) to Microgram per Liter (ug/L) using the exact conversion factor (1 grain per quart = 68,472.24418 microgram per liter). See the formula, worked examples, and conversion table.
Grains per Quart to Micrograms per Liter 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 0.06847224418 / 1e-6.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Grains per Quart to Micrograms per Liter
Grain per Quart and Microgram per Liter 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
micrograms per liter = grains per quart × 68472.2441811
This factor comes from each unit's defined relationship to the category's base unit: 1 grain per quart equals 0.0684722441811 base units, and 1 microgram per liter equals 0.000001 base units, so dividing one by the other gives the direct grain per quart-to-microgram per liter factor of 68472.2441811.
Simple example
1 gr/qt × 68472.24418 = 68,472.24418 ug/L
1 grain per quart = 68,472.24418 micrograms per liter.
Real-world example
1,000 gr/qt × 68472.24418 = 68,472,244.18 ug/L
1,000 grains per quart = 68,472,244.18 micrograms per liter.
Conversion table
| Grain per Quart (gr/qt) | Microgram per Liter (ug/L) |
|---|---|
| 0.1 gr/qt | 6,847.224418 ug/L |
| 1 gr/qt | 68,472.24418 ug/L |
| 10 gr/qt | 684,722.4418 ug/L |
| 100 gr/qt | 6,847,224.418 ug/L |
| 1,000 gr/qt | 68,472,244.18 ug/L |
| 10,000 gr/qt | 684,722,441.8 ug/L |
Reverse conversion: Microgram per Liter to Grain per Quart
1 ug/L × 0.00001460445779 = 0.0000146045 gr/qt
1 microgram per liter = 0.0000146045 grains per quart.
grains per quart = micrograms per liter × 0.000014604457791
For a page dedicated to this direction, see Microgram per Liter to Grain per Quart.
Understanding the Grain per Quart (gr/qt)
Mass per volume density.
Understanding the Microgram per Liter (ug/L)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many micrograms per liter are in 1 grain per quart?
1 grain per quart equals 68,472.24418 micrograms per liter, using the exact defined conversion factor rather than an estimate.
How do I convert grain per quart to microgram per liter?
Multiply the grain per quart value by 68472.24418. The converter above does this instantly to whatever precision you set.
How do I convert microgram per liter back to grain per quart?
Use the reverse factor: 1 microgram per liter equals 0.0000146045 grains per quart. You can also use the swap control in the converter above to flip the direction instantly.
What is a grain per quart?
Grain per Quart (gr/qt) is a unit of density.
What is a microgram per liter?
Microgram per Liter (ug/L) is a unit of density.
Is the grain per quart to microgram per liter conversion exact?
Yes. Both grain per quart and microgram per liter are defined by fixed standards rather than physical artifacts, so the factor of 68472.24418 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.