Mass per volume density.
Pounds per Cubic foot to Long tons per Quart Converter — lb/ft3 to long ton/qt
Convert Pound per Cubic foot (lb/ft3) to Long ton per Quart (long ton/qt) using the exact conversion factor (1 pound per cubic foot = 0.0000149197 long ton per quart). See the formula, worked examples, conversion table, and common uses.
Pounds per Cubic foot to Long tons 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 / 1.07364479e+6.
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 Long tons per Quart
Pound per Cubic foot and Long ton 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
long tons per quart = pounds per cubic foot × 0.0000149197048611
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 long ton per quart equals 1073644.78876 base units, so dividing one by the other gives the direct pound per cubic foot-to-long ton per quart factor of 0.0000149197048611.
Simple example
1 lb/ft3 × 0.00001491970486 = 0.0000149197 long ton/qt
1 pound per cubic foot = 0.0000149197 long tons per quart.
Real-world example
1,000 lb/ft3 × 0.00001491970486 = 0.0149197049 long ton/qt
1,000 pounds per cubic foot = 0.0149197049 long tons per quart.
Conversion table
| Pound per Cubic foot (lb/ft3) | Long ton per Quart (long ton/qt) |
|---|---|
| 0.1 lb/ft3 | 0.000001492 long ton/qt |
| 1 lb/ft3 | 0.0000149197 long ton/qt |
| 10 lb/ft3 | 0.000149197 long ton/qt |
| 100 lb/ft3 | 0.0014919705 long ton/qt |
| 1,000 lb/ft3 | 0.0149197049 long ton/qt |
| 10,000 lb/ft3 | 0.1491970486 long ton/qt |
Reverse conversion: Long ton per Quart to Pound per Cubic foot
0.0000149197 long ton/qt × 67025.45455 = 0.9999996742 lb/ft3
0.0000149197 long tons per quart = 0.9999996742 pounds per cubic foot.
pounds per cubic foot = long tons per quart × 67025.4545455
For a page dedicated to this direction, see Long ton 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 Long ton per Quart (long ton/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 long tons per quart are in 1 pound per cubic foot?
1 pound per cubic foot equals 0.0000149197 long tons per quart, using the exact defined conversion factor rather than an estimate.
How do I convert pound per cubic foot to long ton per quart?
Multiply the pound per cubic foot value by 0.00001491970486. The converter above does this instantly to whatever precision you set.
How do I convert long ton per quart back to pound per cubic foot?
Use the reverse factor: 1 long ton per quart equals 67,025.45455 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 long ton per quart?
Long ton per Quart (long ton/qt) is a unit of density.
Is the pound per cubic foot to long ton per quart conversion exact?
Yes. Both pound per cubic foot and long ton per quart are defined by fixed standards rather than physical artifacts, so the factor of 0.00001491970486 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.