Mass per volume density.
Ounce per Cubic inches to Pounds per Quart Converter — oz/in3 to lb/qt
Convert Ounce per Cubic inch (oz/in3) to Pound per Quart (lb/qt) using the exact conversion factor (1 ounce per cubic inch = 3.609375 pound per quart). See the formula, worked examples, and conversion table.
Ounce per Cubic inches to Pounds per Quart 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 1729.994044 / 479.3057093.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Ounce per Cubic inches to Pounds per Quart
Ounce per Cubic inch and Pound per Quart 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 quart = ounce per cubic inches × 3.609375
This factor comes from each unit's defined relationship to the category's base unit: 1 ounce per cubic inch equals 1729.99404439 base units, and 1 pound per quart equals 479.305709268 base units, so dividing one by the other gives the direct ounce per cubic inch-to-pound per quart factor of 3.609375.
Simple example
1 oz/in3 × 3.609375 = 3.609375 lb/qt
1 ounce per cubic inch = 3.609375 pounds per quart.
Real-world example
1,000 oz/in3 × 3.609375 = 3,609.375 lb/qt
1,000 ounce per cubic inches = 3,609.375 pounds per quart.
Conversion table
| Ounce per Cubic inch (oz/in3) | Pound per Quart (lb/qt) |
|---|---|
| 0.1 oz/in3 | 0.3609375 lb/qt |
| 1 oz/in3 | 3.609375 lb/qt |
| 10 oz/in3 | 36.09375 lb/qt |
| 100 oz/in3 | 360.9375 lb/qt |
| 1,000 oz/in3 | 3,609.375 lb/qt |
| 10,000 oz/in3 | 36,093.75 lb/qt |
Reverse conversion: Pound per Quart to Ounce per Cubic inch
3.609375 lb/qt × 0.2770562771 = 1 oz/in3
3.609375 pounds per quart = 1 ounce per cubic inches.
ounce per cubic inches = pounds per quart × 0.277056277056
For a page dedicated to this direction, see Pound per Quart to Ounce per Cubic inch.
Understanding the Ounce per Cubic inch (oz/in3)
Mass per volume density.
Understanding the Pound per Quart (lb/qt)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many pounds per quart are in 1 ounce per cubic inch?
1 ounce per cubic inch equals 3.609375 pounds per quart, using the exact defined conversion factor rather than an estimate.
How do I convert ounce per cubic inch to pound per quart?
Multiply the ounce per cubic inch value by 3.609375. The converter above does this instantly to whatever precision you set.
How do I convert pound per quart back to ounce per cubic inch?
Use the reverse factor: 1 pound per quart equals 0.2770562771 ounce per cubic inches. You can also use the swap control in the converter above to flip the direction instantly.
What is a ounce per cubic inch?
Ounce per Cubic inch (oz/in3) is a unit of density.
What is a pound per quart?
Pound per Quart (lb/qt) is a unit of density.
Is the ounce per cubic inch to pound per quart conversion exact?
Yes. Both ounce per cubic inch and pound per quart are defined by fixed standards rather than physical artifacts, so the factor of 3.609375 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.