Mass per volume density.
Grains per Cup to Ounces per Gallon Converter — gr/cup to oz/gal
Convert Grain per Cup (gr/cup) to Ounce per Gallon (oz/gal) using the exact conversion factor (1 grain per cup = 0.0365714286 ounce per gallon). See the formula, worked examples, conversion table, and common uses.
Grains per Cup to Ounces 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 0.2738889767 / 7.489151707.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Grains per Cup to Ounces per Gallon
Grain per Cup and Ounce 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
ounces per gallon = grains per cup × 0.0365714285714
This factor comes from each unit's defined relationship to the category's base unit: 1 grain per cup equals 0.273888976724 base units, and 1 ounce per gallon equals 7.48915170731 base units, so dividing one by the other gives the direct grain per cup-to-ounce per gallon factor of 0.0365714285714.
Simple example
1 gr/cup × 0.03657142857 = 0.0365714286 oz/gal
1 grain per cup = 0.0365714286 ounces per gallon.
Real-world example
1,000 gr/cup × 0.03657142857 = 36.57142857 oz/gal
1,000 grains per cup = 36.57142857 ounces per gallon.
Conversion table
| Grain per Cup (gr/cup) | Ounce per Gallon (oz/gal) |
|---|---|
| 0.1 gr/cup | 0.0036571429 oz/gal |
| 1 gr/cup | 0.0365714286 oz/gal |
| 10 gr/cup | 0.3657142857 oz/gal |
| 100 gr/cup | 3.657142857 oz/gal |
| 1,000 gr/cup | 36.57142857 oz/gal |
| 10,000 gr/cup | 365.7142857 oz/gal |
Reverse conversion: Ounce per Gallon to Grain per Cup
0.0365714286 oz/gal × 27.34375 = 1.000000001 gr/cup
0.0365714286 ounces per gallon = 1.000000001 grains per cup.
grains per cup = ounces per gallon × 27.34375
For a page dedicated to this direction, see Ounce per Gallon to Grain per Cup.
Understanding the Grain per Cup (gr/cup)
Mass per volume density.
Understanding the Ounce per Gallon
Ounce per Gallon (oz/gal) measures concentration (dilution rate). A US customary way to express how much concentrate is mixed into each gallon of a diluted solution. It is classified as a US customary concentration unit.
Where it's used: United States
Uses of the Ounce per Gallon today
- Used to express dilution rates on many US pesticide, herbicide, and household cleaning product labels, which commonly specify a number of fluid ounces of concentrate per gallon of water
Ounce per Gallon — sources
- US product-label dilution conventions (pesticide/herbicide industry guides) — Fluid ounces of concentrate per gallon is a widely used label format for US spray and cleaning product dilution instructions.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many ounces per gallon are in 1 grain per cup?
1 grain per cup equals 0.0365714286 ounces per gallon, using the exact defined conversion factor rather than an estimate.
How do I convert grain per cup to ounce per gallon?
Multiply the grain per cup value by 0.03657142857. The converter above does this instantly to whatever precision you set.
How do I convert ounce per gallon back to grain per cup?
Use the reverse factor: 1 ounce per gallon equals 27.34375 grains per cup. You can also use the swap control in the converter above to flip the direction instantly.
What is a grain per cup?
Grain per Cup (gr/cup) is a unit of density.
What is a ounce per gallon?
Ounce per Gallon (oz/gal) measures concentration (dilution rate). A US customary way to express how much concentrate is mixed into each gallon of a diluted solution. It is classified as a US customary concentration unit.
Is the grain per cup to ounce per gallon conversion exact?
Yes. Both grain per cup and ounce per gallon are defined by fixed standards rather than physical artifacts, so the factor of 0.03657142857 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.