Mass per volume density.
Grains per Gallon to Ounces per Cup Converter — gr/gal to oz/cup
Convert Grain per Gallon (gr/gal) to Ounce per Cup (oz/cup) using the exact conversion factor (1 grain per gallon = 0.0001428571 ounce per cup). See the formula, worked examples, and conversion table.
Grains per Gallon to Ounces per Cup 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 / 119.8264273.
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 Ounces per Cup
Grain per Gallon and Ounce per Cup 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
ounces per cup = grains per gallon × 0.000142857142857
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 ounce per cup equals 119.826427317 base units, so dividing one by the other gives the direct grain per gallon-to-ounce per cup factor of 0.000142857142857.
Simple example
1 gr/gal × 0.0001428571429 = 0.0001428571 oz/cup
1 grain per gallon = 0.0001428571 ounces per cup.
Real-world example
1,000 gr/gal × 0.0001428571429 = 0.1428571429 oz/cup
1,000 grains per gallon = 0.1428571429 ounces per cup.
Conversion table
| Grain per Gallon (gr/gal) | Ounce per Cup (oz/cup) |
|---|---|
| 0.1 gr/gal | 0.0000142857 oz/cup |
| 1 gr/gal | 0.0001428571 oz/cup |
| 10 gr/gal | 0.0014285714 oz/cup |
| 100 gr/gal | 0.0142857143 oz/cup |
| 1,000 gr/gal | 0.1428571429 oz/cup |
| 10,000 gr/gal | 1.428571429 oz/cup |
Reverse conversion: Ounce per Cup to Grain per Gallon
0.0001428571 oz/cup × 7000 = 0.9999997 gr/gal
0.0001428571 ounces per cup = 0.9999997 grains per gallon.
grains per gallon = ounces per cup × 7000
For a page dedicated to this direction, see Ounce per Cup to Grain per Gallon.
Understanding the Grain per Gallon (gr/gal)
Mass per volume density.
Understanding the Ounce per Cup (oz/cup)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many ounces per cup are in 1 grain per gallon?
1 grain per gallon equals 0.0001428571 ounces per cup, using the exact defined conversion factor rather than an estimate.
How do I convert grain per gallon to ounce per cup?
Multiply the grain per gallon value by 0.0001428571429. The converter above does this instantly to whatever precision you set.
How do I convert ounce per cup back to grain per gallon?
Use the reverse factor: 1 ounce per cup equals 7,000 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 ounce per cup?
Ounce per Cup (oz/cup) is a unit of density.
Is the grain per gallon to ounce per cup conversion exact?
Yes. Both grain per gallon and ounce per cup are defined by fixed standards rather than physical artifacts, so the factor of 0.0001428571429 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.