Mass per volume density.
Micrograms per Gallon to Grains per Cubic yard Converter — ug/gal to gr/yd3
Convert Microgram per Gallon (ug/gal) to Grain per Cubic yard (gr/yd3) using the exact conversion factor (1 microgram per gallon = 0.0031169355 grain per cubic yard). See the formula, worked examples, and conversion table.
Micrograms per Gallon to Grains per Cubic yard 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 2.64172052e-7 / 8.47537745e-5.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Micrograms per Gallon to Grains per Cubic yard
Microgram per Gallon and Grain per Cubic yard 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 cubic yard = micrograms per gallon × 0.00311693554682
This factor comes from each unit's defined relationship to the category's base unit: 1 microgram per gallon equals 2.641721e-7 base units, and 1 grain per cubic yard equals 0.0000847537744654 base units, so dividing one by the other gives the direct microgram per gallon-to-grain per cubic yard factor of 0.00311693554682.
Simple example
1 ug/gal × 0.003116935547 = 0.0031169355 gr/yd3
1 microgram per gallon = 0.0031169355 grains per cubic yard.
Real-world example
1,000 ug/gal × 0.003116935547 = 3.116935547 gr/yd3
1,000 micrograms per gallon = 3.116935547 grains per cubic yard.
Conversion table
| Microgram per Gallon (ug/gal) | Grain per Cubic yard (gr/yd3) |
|---|---|
| 0.1 ug/gal | 0.0003116936 gr/yd3 |
| 1 ug/gal | 0.0031169355 gr/yd3 |
| 10 ug/gal | 0.0311693555 gr/yd3 |
| 100 ug/gal | 0.3116935547 gr/yd3 |
| 1,000 ug/gal | 3.116935547 gr/yd3 |
| 10,000 ug/gal | 31.16935547 gr/yd3 |
Reverse conversion: Grain per Cubic yard to Microgram per Gallon
0.0031169355 gr/yd3 × 320.8279366 = 0.999999985 ug/gal
0.0031169355 grains per cubic yard = 0.999999985 micrograms per gallon.
micrograms per gallon = grains per cubic yard × 320.8279366
For a page dedicated to this direction, see Grain per Cubic yard to Microgram per Gallon.
Understanding the Microgram per Gallon (ug/gal)
Mass per volume density.
Understanding the Grain per Cubic yard (gr/yd3)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many grains per cubic yard are in 1 microgram per gallon?
1 microgram per gallon equals 0.0031169355 grains per cubic yard, using the exact defined conversion factor rather than an estimate.
How do I convert microgram per gallon to grain per cubic yard?
Multiply the microgram per gallon value by 0.003116935547. The converter above does this instantly to whatever precision you set.
How do I convert grain per cubic yard back to microgram per gallon?
Use the reverse factor: 1 grain per cubic yard equals 320.8279366 micrograms per gallon. You can also use the swap control in the converter above to flip the direction instantly.
What is a microgram per gallon?
Microgram per Gallon (ug/gal) is a unit of density.
What is a grain per cubic yard?
Grain per Cubic yard (gr/yd3) is a unit of density.
Is the microgram per gallon to grain per cubic yard conversion exact?
Yes. Both microgram per gallon and grain per cubic yard are defined by fixed standards rather than physical artifacts, so the factor of 0.003116935547 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.