Mass per volume density.
Micrograms per Liter to Grains per Quart Converter — ug/L to gr/qt
Convert Microgram per Liter (ug/L) to Grain per Quart (gr/qt) using the exact conversion factor (1 microgram per liter = 0.0000146045 grain per quart). See the formula, worked examples, and conversion table.
Micrograms per Liter 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 1e-6 / 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 Liter to Grains per Quart
Microgram per Liter 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 liter × 0.000014604457791
This factor comes from each unit's defined relationship to the category's base unit: 1 microgram per liter equals 0.000001 base units, and 1 grain per quart equals 0.0684722441811 base units, so dividing one by the other gives the direct microgram per liter-to-grain per quart factor of 0.000014604457791.
Simple example
1 ug/L × 0.00001460445779 = 0.0000146045 gr/qt
1 microgram per liter = 0.0000146045 grains per quart.
Real-world example
1,000 ug/L × 0.00001460445779 = 0.0146044578 gr/qt
1,000 micrograms per liter = 0.0146044578 grains per quart.
Conversion table
| Microgram per Liter (ug/L) | Grain per Quart (gr/qt) |
|---|---|
| 0.1 ug/L | 0.0000014604 gr/qt |
| 1 ug/L | 0.0000146045 gr/qt |
| 10 ug/L | 0.0001460446 gr/qt |
| 100 ug/L | 0.0014604458 gr/qt |
| 1,000 ug/L | 0.0146044578 gr/qt |
| 10,000 ug/L | 0.1460445779 gr/qt |
Reverse conversion: Grain per Quart to Microgram per Liter
0.0000146045 gr/qt × 68472.24418 = 1.00000289 ug/L
0.0000146045 grains per quart = 1.00000289 micrograms per liter.
micrograms per liter = grains per quart × 68472.2441811
For a page dedicated to this direction, see Grain per Quart to Microgram per Liter.
Understanding the Microgram per Liter (ug/L)
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 liter?
1 microgram per liter equals 0.0000146045 grains per quart, using the exact defined conversion factor rather than an estimate.
How do I convert microgram per liter to grain per quart?
Multiply the microgram per liter value by 0.00001460445779. The converter above does this instantly to whatever precision you set.
How do I convert grain per quart back to microgram per liter?
Use the reverse factor: 1 grain per quart equals 68,472.24418 micrograms per liter. You can also use the swap control in the converter above to flip the direction instantly.
What is a microgram per liter?
Microgram per Liter (ug/L) 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 liter to grain per quart conversion exact?
Yes. Both microgram per liter and grain per quart are defined by fixed standards rather than physical artifacts, so the factor of 0.00001460445779 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.