Mass per volume density.
Pound per Cubic inches to Long tons per Gallon Converter — lb/in3 to long ton/gal
Convert Pound per Cubic inch (lb/in3) to Long ton per Gallon (long ton/gal) using the exact conversion factor (1 pound per cubic inch = 0.103125 long ton per gallon). See the formula, worked examples, conversion table, and common uses.
Pound per Cubic inches 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 27679.90471 / 268411.1972.
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 Gallon
Pound per Cubic inch 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 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 gallon = pound per cubic inches × 0.103125
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 gallon equals 268411.19719 base units, so dividing one by the other gives the direct pound per cubic inch-to-long ton per gallon factor of 0.103125.
Simple example
1 lb/in3 × 0.103125 = 0.103125 long ton/gal
1 pound per cubic inch = 0.103125 long tons per gallon.
Real-world example
1,000 lb/in3 × 0.103125 = 103.125 long ton/gal
1,000 pound per cubic inches = 103.125 long tons per gallon.
Conversion table
| Pound per Cubic inch (lb/in3) | Long ton per Gallon (long ton/gal) |
|---|---|
| 0.1 lb/in3 | 0.0103125 long ton/gal |
| 1 lb/in3 | 0.103125 long ton/gal |
| 10 lb/in3 | 1.03125 long ton/gal |
| 100 lb/in3 | 10.3125 long ton/gal |
| 1,000 lb/in3 | 103.125 long ton/gal |
| 10,000 lb/in3 | 1,031.25 long ton/gal |
Reverse conversion: Long ton per Gallon to Pound per Cubic inch
0.103125 long ton/gal × 9.696969697 = 1 lb/in3
0.103125 long tons per gallon = 1 pound per cubic inches.
pound per cubic inches = long tons per gallon × 9.69696969697
For a page dedicated to this direction, see Long ton per Gallon 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 Gallon (long ton/gal)
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 gallon are in 1 pound per cubic inch?
1 pound per cubic inch equals 0.103125 long tons per gallon, using the exact defined conversion factor rather than an estimate.
How do I convert pound per cubic inch to long ton per gallon?
Multiply the pound per cubic inch value by 0.103125. The converter above does this instantly to whatever precision you set.
How do I convert long ton per gallon back to pound per cubic inch?
Use the reverse factor: 1 long ton per gallon equals 9.696969697 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 gallon?
Long ton per Gallon (long ton/gal) is a unit of density.
Is the pound per cubic inch to long ton per gallon conversion exact?
Yes. Both pound per cubic inch and long ton per gallon are defined by fixed standards rather than physical artifacts, so the factor of 0.103125 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.