Mass per volume density.
Pound per Cubic inches to Long tons per Cubic foot Converter — lb/in3 to long ton/ft3
Convert Pound per Cubic inch (lb/in3) to Long ton per Cubic foot (long ton/ft3) using the exact conversion factor (1 pound per cubic inch = 0.7714285714 long ton per cubic foot). See the formula, worked examples, conversion table, and common uses.
Pound per Cubic inches to Long tons per Cubic foot 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 27679.90471 / 35881.35796.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Pound per Cubic inches to Long tons per Cubic foot
Pound per Cubic inch and Long ton per Cubic foot 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 inch is most often used for used in machining and materials engineering, particularly for describing the density of metals, where a smaller volume unit than the cubic foot gives a more convenient figure.
Formula
long tons per cubic foot = pound per cubic inches × 0.771428571429
This factor comes from each unit's defined relationship to the category's base unit: 1 pound per cubic inch equals 27679.9047102 base units, and 1 long ton per cubic foot equals 35881.3579577 base units, so dividing one by the other gives the direct pound per cubic inch-to-long ton per cubic foot factor of 0.771428571429.
Simple example
1 lb/in3 × 0.7714285714 = 0.7714285714 long ton/ft3
1 pound per cubic inch = 0.7714285714 long tons per cubic foot.
Real-world example
1,000 lb/in3 × 0.7714285714 = 771.4285714 long ton/ft3
1,000 pound per cubic inches = 771.4285714 long tons per cubic foot.
Conversion table
| Pound per Cubic inch (lb/in3) | Long ton per Cubic foot (long ton/ft3) |
|---|---|
| 0.1 lb/in3 | 0.0771428571 long ton/ft3 |
| 1 lb/in3 | 0.7714285714 long ton/ft3 |
| 10 lb/in3 | 7.714285714 long ton/ft3 |
| 100 lb/in3 | 77.14285714 long ton/ft3 |
| 1,000 lb/in3 | 771.4285714 long ton/ft3 |
| 10,000 lb/in3 | 7,714.285714 long ton/ft3 |
Reverse conversion: Long ton per Cubic foot to Pound per Cubic inch
0.7714285714 long ton/ft3 × 1.296296296 = 1 lb/in3
0.7714285714 long tons per cubic foot = 1 pound per cubic inches.
pound per cubic inches = long tons per cubic foot × 1.2962962963
For a page dedicated to this direction, see Long ton per Cubic foot to Pound per Cubic inch.
Understanding the Pound per Cubic inch
Pound per Cubic inch (lb/in3) measures density. A US customary density unit suited to describing dense materials in a small volume. It is classified as a US customary density unit.
Where it's used: United States
Uses of the Pound per Cubic inch today
- Used in machining and materials engineering, particularly for describing the density of metals, where a smaller volume unit than the cubic foot gives a more convenient figure
Understanding the Long ton per Cubic foot (long ton/ft3)
Mass per volume density.
Pound per Cubic inch — sources
- US materials-engineering reference tables — Pounds per cubic inch is a commonly tabulated density unit for metals in US machining and materials references.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many long tons per cubic foot are in 1 pound per cubic inch?
1 pound per cubic inch equals 0.7714285714 long tons per cubic foot, using the exact defined conversion factor rather than an estimate.
How do I convert pound per cubic inch to long ton per cubic foot?
Multiply the pound per cubic inch value by 0.7714285714. The converter above does this instantly to whatever precision you set.
How do I convert long ton per cubic foot back to pound per cubic inch?
Use the reverse factor: 1 long ton per cubic foot equals 1.296296296 pound per cubic inches. You can also use the swap control in the converter above to flip the direction instantly.
What is a pound per cubic inch?
Pound per Cubic inch (lb/in3) measures density. A US customary density unit suited to describing dense materials in a small volume. It is classified as a US customary density unit.
What is a long ton per cubic foot?
Long ton per Cubic foot (long ton/ft3) is a unit of density.
Is the pound per cubic inch to long ton per cubic foot conversion exact?
Yes. Both pound per cubic inch and long ton per cubic foot are defined by fixed standards rather than physical artifacts, so the factor of 0.7714285714 used above is exact to as many digits as you choose to display.
Where is the pound per cubic inch still used today?
United States
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.