Mass per volume density.
Ounces per Quart to Pounds per Gallon Converter — oz/qt to lb/gal
Convert Ounce per Quart (oz/qt) to Pound per Gallon (lb/gal) using the exact conversion factor (1 ounce per quart = 0.25 pound per gallon). See the formula, worked examples, conversion table, and common uses.
Ounces per Quart to Pounds 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 29.95660683 / 119.8264273.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Ounces per Quart to Pounds per Gallon
Ounce per Quart and Pound 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
pounds per gallon = ounces per quart × 0.25
This factor comes from each unit's defined relationship to the category's base unit: 1 ounce per quart equals 29.9566068292 base units, and 1 pound per gallon equals 119.826427317 base units, so dividing one by the other gives the direct ounce per quart-to-pound per gallon factor of 0.25.
Simple example
1 oz/qt × 0.25 = 0.25 lb/gal
1 ounce per quart = 0.25 pounds per gallon.
Real-world example
1,000 oz/qt × 0.25 = 250 lb/gal
1,000 ounces per quart = 250 pounds per gallon.
Conversion table
| Ounce per Quart (oz/qt) | Pound per Gallon (lb/gal) |
|---|---|
| 0.1 oz/qt | 0.025 lb/gal |
| 1 oz/qt | 0.25 lb/gal |
| 10 oz/qt | 2.5 lb/gal |
| 100 oz/qt | 25 lb/gal |
| 1,000 oz/qt | 250 lb/gal |
| 10,000 oz/qt | 2,500 lb/gal |
Reverse conversion: Pound per Gallon to Ounce per Quart
0.25 lb/gal × 4 = 1 oz/qt
0.25 pounds per gallon = 1 ounce per quart.
ounces per quart = pounds per gallon × 4
For a page dedicated to this direction, see Pound per Gallon to Ounce per Quart.
Understanding the Ounce per Quart (oz/qt)
Mass per volume density.
Understanding the Pound per Gallon
Pound per Gallon (lb/gal) measures density. The US customary unit for liquid density, based on the US gallon (231 cubic inches). It is classified as a US customary density unit.
Where it's used: United States (paint, fuel, and industrial liquid density specifications)
lb/gal vs. lb/ft³. Both are US customary density units; they're related through the real, fixed relationship between the US gallon and the cubic foot (1 cubic foot ≈ 7.48 US gallons), not a round conversion factor.
Uses of the Pound per Gallon today
- US paint and coatings density specifications
- US fuel and petroleum liquid density specs
- Industrial liquid handling and shipping weight calculations
Pound per Gallon — sources
- NIST Handbook 44 — General tables of units including US customary density measures.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many pounds per gallon are in 1 ounce per quart?
1 ounce per quart equals 0.25 pounds per gallon, using the exact defined conversion factor rather than an estimate.
How do I convert ounce per quart to pound per gallon?
Multiply the ounce per quart value by 0.25. The converter above does this instantly to whatever precision you set.
How do I convert pound per gallon back to ounce per quart?
Use the reverse factor: 1 pound per gallon equals 4 ounces per quart. You can also use the swap control in the converter above to flip the direction instantly.
What is a ounce per quart?
Ounce per Quart (oz/qt) is a unit of density.
What is a pound per gallon?
Pound per Gallon (lb/gal) measures density. The US customary unit for liquid density, based on the US gallon (231 cubic inches). It is classified as a US customary density unit.
Is the ounce per quart to pound per gallon conversion exact?
Yes. Both ounce per quart and pound per gallon are defined by fixed standards rather than physical artifacts, so the factor of 0.25 used above is exact to as many digits as you choose to display.
What is the difference between lb/gal vs. lb/ft³?
Both are US customary density units; they're related through the real, fixed relationship between the US gallon and the cubic foot (1 cubic foot ≈ 7.48 US gallons), not a round conversion factor.