Mass per volume density.
Grains per Gallon to Micrograms per Cubic yard Converter — gr/gal to ug/yd3
Convert Grain per Gallon (gr/gal) to Microgram per Cubic yard (ug/yd3) using the exact conversion factor (1 grain per gallon = 13,087,696.73 microgram per cubic yard). See the formula, worked examples, and conversion table.
Grains per Gallon to Micrograms 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 0.01711806105 / 1.30795062e-9.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Grains per Gallon to Micrograms per Cubic yard
Grain per Gallon and Microgram 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
micrograms per cubic yard = grains per gallon × 13087696.7314
This factor comes from each unit's defined relationship to the category's base unit: 1 grain per gallon equals 0.0171180610453 base units, and 1 microgram per cubic yard equals 1.307951e-9 base units, so dividing one by the other gives the direct grain per gallon-to-microgram per cubic yard factor of 13087696.7314.
Simple example
1 gr/gal × 13087696.73 = 13,087,696.73 ug/yd3
1 grain per gallon = 13,087,696.73 micrograms per cubic yard.
Real-world example
1,000 gr/gal × 13087696.73 = 13,087,696,730 ug/yd3
1,000 grains per gallon = 13,087,696,730 micrograms per cubic yard.
Conversion table
| Grain per Gallon (gr/gal) | Microgram per Cubic yard (ug/yd3) |
|---|---|
| 0.1 gr/gal | 1,308,769.673 ug/yd3 |
| 1 gr/gal | 13,087,696.73 ug/yd3 |
| 10 gr/gal | 130,876,967.3 ug/yd3 |
| 100 gr/gal | 1,308,769,673 ug/yd3 |
| 1,000 gr/gal | 13,087,696,730 ug/yd3 |
| 10,000 gr/gal | 130,876,967,300 ug/yd3 |
Reverse conversion: Microgram per Cubic yard to Grain per Gallon
1 ug/yd3 × 7.640764e-8 = 7.640764e-8 gr/gal
1 microgram per cubic yard = 7.640764e-8 grains per gallon.
grains per gallon = micrograms per cubic yard × 7.640764e-8
For a page dedicated to this direction, see Microgram per Cubic yard to Grain per Gallon.
Understanding the Grain per Gallon (gr/gal)
Mass per volume density.
Understanding the Microgram per Cubic yard (ug/yd3)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many micrograms per cubic yard are in 1 grain per gallon?
1 grain per gallon equals 13,087,696.73 micrograms per cubic yard, using the exact defined conversion factor rather than an estimate.
How do I convert grain per gallon to microgram per cubic yard?
Multiply the grain per gallon value by 13087696.73. The converter above does this instantly to whatever precision you set.
How do I convert microgram per cubic yard back to grain per gallon?
Use the reverse factor: 1 microgram per cubic yard equals 7.640764e-8 grains per gallon. You can also use the swap control in the converter above to flip the direction instantly.
What is a grain per gallon?
Grain per Gallon (gr/gal) is a unit of density.
What is a microgram per cubic yard?
Microgram per Cubic yard (ug/yd3) is a unit of density.
Is the grain per gallon to microgram per cubic yard conversion exact?
Yes. Both grain per gallon and microgram per cubic yard are defined by fixed standards rather than physical artifacts, so the factor of 13087696.73 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.