Mass per volume density.
Ounces per Gallon to Pounds per Cup Converter — oz/gal to lb/cup
Convert Ounce per Gallon (oz/gal) to Pound per Cup (lb/cup) using the exact conversion factor (1 ounce per gallon = 0.00390625 pound per cup). See the formula, worked examples, conversion table, and common uses.
Ounces per Gallon to Pounds 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 7.489151707 / 1917.222837.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Ounces per Gallon to Pounds per Cup
Ounce per Gallon and Pound 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. Ounce per Gallon is most often used for 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.
Formula
pounds per cup = ounces per gallon × 0.00390625
This factor comes from each unit's defined relationship to the category's base unit: 1 ounce per gallon equals 7.48915170731 base units, and 1 pound per cup equals 1917.22283707 base units, so dividing one by the other gives the direct ounce per gallon-to-pound per cup factor of 0.00390625.
Simple example
1 oz/gal × 0.00390625 = 0.00390625 lb/cup
1 ounce per gallon = 0.00390625 pounds per cup.
Real-world example
1,000 oz/gal × 0.00390625 = 3.90625 lb/cup
1,000 ounces per gallon = 3.90625 pounds per cup.
Conversion table
| Ounce per Gallon (oz/gal) | Pound per Cup (lb/cup) |
|---|---|
| 0.1 oz/gal | 0.000390625 lb/cup |
| 1 oz/gal | 0.00390625 lb/cup |
| 10 oz/gal | 0.0390625 lb/cup |
| 100 oz/gal | 0.390625 lb/cup |
| 1,000 oz/gal | 3.90625 lb/cup |
| 10,000 oz/gal | 39.0625 lb/cup |
Reverse conversion: Pound per Cup to Ounce per Gallon
0.00390625 lb/cup × 256 = 1 oz/gal
0.00390625 pounds per cup = 1 ounce per gallon.
ounces per gallon = pounds per cup × 256
For a page dedicated to this direction, see Pound per Cup to Ounce per Gallon.
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
Understanding the Pound per Cup (lb/cup)
Mass per volume density.
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 pounds per cup are in 1 ounce per gallon?
1 ounce per gallon equals 0.00390625 pounds per cup, using the exact defined conversion factor rather than an estimate.
How do I convert ounce per gallon to pound per cup?
Multiply the ounce per gallon value by 0.00390625. The converter above does this instantly to whatever precision you set.
How do I convert pound per cup back to ounce per gallon?
Use the reverse factor: 1 pound per cup equals 256 ounces per gallon. You can also use the swap control in the converter above to flip the direction instantly.
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.
What is a pound per cup?
Pound per Cup (lb/cup) is a unit of density.
Is the ounce per gallon to pound per cup conversion exact?
Yes. Both ounce per gallon and pound per cup are defined by fixed standards rather than physical artifacts, so the factor of 0.00390625 used above is exact to as many digits as you choose to display.
Where is the ounce per gallon still used today?
United States
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.