Mass per volume density.
Pounds per Cubic foot to Pounds per Quart Converter — lb/ft3 to lb/qt
Convert Pound per Cubic foot (lb/ft3) to Pound per Quart (lb/qt) using the exact conversion factor (1 pound per cubic foot = 0.0334201389 pound per quart). See the formula, worked examples, conversion table, and common uses.
Pounds per Cubic foot 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 16.01846337 / 479.3057093.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Pounds per Cubic foot to Pounds per Quart
Pound per Cubic foot 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. Pound per Cubic foot is most often used for us construction material density specs (concrete, soil, lumber, insulation).
Formula
pounds per quart = pounds per cubic foot × 0.0334201388889
This factor comes from each unit's defined relationship to the category's base unit: 1 pound per cubic foot equals 16.018463374 base units, and 1 pound per quart equals 479.305709268 base units, so dividing one by the other gives the direct pound per cubic foot-to-pound per quart factor of 0.0334201388889.
Simple example
1 lb/ft3 × 0.03342013889 = 0.0334201389 lb/qt
1 pound per cubic foot = 0.0334201389 pounds per quart.
Real-world example
1,000 lb/ft3 × 0.03342013889 = 33.42013889 lb/qt
1,000 pounds per cubic foot = 33.42013889 pounds per quart.
Conversion table
| Pound per Cubic foot (lb/ft3) | Pound per Quart (lb/qt) |
|---|---|
| 0.1 lb/ft3 | 0.0033420139 lb/qt |
| 1 lb/ft3 | 0.0334201389 lb/qt |
| 10 lb/ft3 | 0.3342013889 lb/qt |
| 100 lb/ft3 | 3.342013889 lb/qt |
| 1,000 lb/ft3 | 33.42013889 lb/qt |
| 10,000 lb/ft3 | 334.2013889 lb/qt |
Reverse conversion: Pound per Quart to Pound per Cubic foot
0.0334201389 lb/qt × 29.92207792 = 1 lb/ft3
0.0334201389 pounds per quart = 1 pounds per cubic foot.
pounds per cubic foot = pounds per quart × 29.9220779221
For a page dedicated to this direction, see Pound per Quart to Pound per Cubic foot.
Understanding the Pound per Cubic foot
Pound per Cubic foot (lb/ft3) measures density. The US customary unit for expressing density, commonly used in construction and engineering material specifications. It is classified as a US customary density unit.
Where it's used: United States (construction, engineering, materials specifications)
Uses of the Pound per Cubic foot today
- US construction material density specs (concrete, soil, lumber, insulation)
- US engineering material property tables
- Bulk material handling and shipping weight estimates
Understanding the Pound per Quart (lb/qt)
Mass per volume density.
Pound per Cubic foot — 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 quart are in 1 pound per cubic foot?
1 pound per cubic foot equals 0.0334201389 pounds per quart, using the exact defined conversion factor rather than an estimate.
How do I convert pound per cubic foot to pound per quart?
Multiply the pound per cubic foot value by 0.03342013889. The converter above does this instantly to whatever precision you set.
How do I convert pound per quart back to pound per cubic foot?
Use the reverse factor: 1 pound per quart equals 29.92207792 pounds per cubic foot. You can also use the swap control in the converter above to flip the direction instantly.
What is a pound per cubic foot?
Pound per Cubic foot (lb/ft3) measures density. The US customary unit for expressing density, commonly used in construction and engineering material specifications. It is classified as a US customary density unit.
What is a pound per quart?
Pound per Quart (lb/qt) is a unit of density.
Is the pound per cubic foot to pound per quart conversion exact?
Yes. Both pound per cubic foot and pound per quart are defined by fixed standards rather than physical artifacts, so the factor of 0.03342013889 used above is exact to as many digits as you choose to display.
Where is the pound per cubic foot still used today?
United States (construction, engineering, materials specifications)
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.