Mass per volume density.
Pounds per Cubic foot to Long tons per Gallon Converter — lb/ft3 to long ton/gal
Convert Pound per Cubic foot (lb/ft3) to Long ton per Gallon (long ton/gal) using the exact conversion factor (1 pound per cubic foot = 0.0000596788 long ton per gallon). See the formula, worked examples, conversion table, and common uses.
Pounds per Cubic foot to Long tons 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 16.01846337 / 268411.1972.
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 Gallon
Pound per Cubic foot and Long ton 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. Pound per Cubic foot is most often used for us construction material density specs (concrete, soil, lumber, insulation).
Formula
long tons per gallon = pounds per cubic foot × 0.0000596788194444
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 gallon equals 268411.19719 base units, so dividing one by the other gives the direct pound per cubic foot-to-long ton per gallon factor of 0.0000596788194444.
Simple example
1 lb/ft3 × 0.00005967881944 = 0.0000596788 long ton/gal
1 pound per cubic foot = 0.0000596788 long tons per gallon.
Real-world example
1,000 lb/ft3 × 0.00005967881944 = 0.0596788194 long ton/gal
1,000 pounds per cubic foot = 0.0596788194 long tons per gallon.
Conversion table
| Pound per Cubic foot (lb/ft3) | Long ton per Gallon (long ton/gal) |
|---|---|
| 0.1 lb/ft3 | 0.0000059679 long ton/gal |
| 1 lb/ft3 | 0.0000596788 long ton/gal |
| 10 lb/ft3 | 0.0005967882 long ton/gal |
| 100 lb/ft3 | 0.0059678819 long ton/gal |
| 1,000 lb/ft3 | 0.0596788194 long ton/gal |
| 10,000 lb/ft3 | 0.5967881944 long ton/gal |
Reverse conversion: Long ton per Gallon to Pound per Cubic foot
0.0000596788 long ton/gal × 16756.36364 = 0.9999996742 lb/ft3
0.0000596788 long tons per gallon = 0.9999996742 pounds per cubic foot.
pounds per cubic foot = long tons per gallon × 16756.3636364
For a page dedicated to this direction, see Long ton per Gallon 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 Gallon (long ton/gal)
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 gallon are in 1 pound per cubic foot?
1 pound per cubic foot equals 0.0000596788 long tons per gallon, using the exact defined conversion factor rather than an estimate.
How do I convert pound per cubic foot to long ton per gallon?
Multiply the pound per cubic foot value by 0.00005967881944. The converter above does this instantly to whatever precision you set.
How do I convert long ton per gallon back to pound per cubic foot?
Use the reverse factor: 1 long ton per gallon equals 16,756.36364 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 gallon?
Long ton per Gallon (long ton/gal) is a unit of density.
Is the pound per cubic foot to long ton per gallon conversion exact?
Yes. Both pound per cubic foot and long ton per gallon are defined by fixed standards rather than physical artifacts, so the factor of 0.00005967881944 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.