Mass per volume density.
Micrograms per Liter to Grains per Gallon Converter — ug/L to gr/gal
Convert Microgram per Liter (ug/L) to Grain per Gallon (gr/gal) using the exact conversion factor (1 microgram per liter = 0.0000584178 grain per gallon). See the formula, worked examples, and conversion table.
Micrograms per Liter to Grains per Gallon 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 / 0.01711806105.
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 Gallon
Microgram per Liter and Grain per Gallon 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 gallon = micrograms per liter × 0.0000584178311641
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 gallon equals 0.0171180610453 base units, so dividing one by the other gives the direct microgram per liter-to-grain per gallon factor of 0.0000584178311641.
Simple example
1 ug/L × 0.00005841783116 = 0.0000584178 gr/gal
1 microgram per liter = 0.0000584178 grains per gallon.
Real-world example
1,000 ug/L × 0.00005841783116 = 0.0584178312 gr/gal
1,000 micrograms per liter = 0.0584178312 grains per gallon.
Conversion table
| Microgram per Liter (ug/L) | Grain per Gallon (gr/gal) |
|---|---|
| 0.1 ug/L | 0.0000058418 gr/gal |
| 1 ug/L | 0.0000584178 gr/gal |
| 10 ug/L | 0.0005841783 gr/gal |
| 100 ug/L | 0.0058417831 gr/gal |
| 1,000 ug/L | 0.0584178312 gr/gal |
| 10,000 ug/L | 0.5841783116 gr/gal |
Reverse conversion: Grain per Gallon to Microgram per Liter
0.0000584178 gr/gal × 17118.06105 = 0.9999994665 ug/L
0.0000584178 grains per gallon = 0.9999994665 micrograms per liter.
micrograms per liter = grains per gallon × 17118.0610453
For a page dedicated to this direction, see Grain per Gallon to Microgram per Liter.
Understanding the Microgram per Liter (ug/L)
Mass per volume density.
Understanding the Grain per Gallon (gr/gal)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many grains per gallon are in 1 microgram per liter?
1 microgram per liter equals 0.0000584178 grains per gallon, using the exact defined conversion factor rather than an estimate.
How do I convert microgram per liter to grain per gallon?
Multiply the microgram per liter value by 0.00005841783116. The converter above does this instantly to whatever precision you set.
How do I convert grain per gallon back to microgram per liter?
Use the reverse factor: 1 grain per gallon equals 17,118.06105 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 gallon?
Grain per Gallon (gr/gal) is a unit of density.
Is the microgram per liter to grain per gallon conversion exact?
Yes. Both microgram per liter and grain per gallon are defined by fixed standards rather than physical artifacts, so the factor of 0.00005841783116 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.