Mass per volume density.
Pounds per Cubic Meter to Long tons per Gallon Converter — lb/m3 to long ton/gal
Convert Pound per Cubic Meter (lb/m3) to Long ton per Gallon (long ton/gal) using the exact conversion factor (1 pound per cubic meter = 0.0000016899 long ton per gallon). See the formula, worked examples, and conversion table.
Pounds per Cubic Meter 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 0.45359237 / 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 Meter to Long tons per Gallon
Pound per Cubic Meter 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. Both are mass per volume density units.
Formula
long tons per gallon = pounds per cubic meter × 0.000001689915975
This factor comes from each unit's defined relationship to the category's base unit: 1 pound per cubic meter equals 0.45359237 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 meter-to-long ton per gallon factor of 0.000001689915975.
Simple example
1 lb/m3 × 0.000001689915975 = 0.0000016899 long ton/gal
1 pound per cubic meter = 0.0000016899 long tons per gallon.
Real-world example
1,000 lb/m3 × 0.000001689915975 = 0.001689916 long ton/gal
1,000 pounds per cubic meter = 0.001689916 long tons per gallon.
Conversion table
| Pound per Cubic Meter (lb/m3) | Long ton per Gallon (long ton/gal) |
|---|---|
| 0.1 lb/m3 | 1.689916e-7 long ton/gal |
| 1 lb/m3 | 0.0000016899 long ton/gal |
| 10 lb/m3 | 0.0000168992 long ton/gal |
| 100 lb/m3 | 0.0001689916 long ton/gal |
| 1,000 lb/m3 | 0.001689916 long ton/gal |
| 10,000 lb/m3 | 0.0168991598 long ton/gal |
Reverse conversion: Long ton per Gallon to Pound per Cubic Meter
0.0000016899 long ton/gal × 591745.3973 = 0.9999905469 lb/m3
0.0000016899 long tons per gallon = 0.9999905469 pounds per cubic meter.
pounds per cubic meter = long tons per gallon × 591745.397282
For a page dedicated to this direction, see Long ton per Gallon to Pound per Cubic Meter.
Understanding the Pound per Cubic Meter (lb/m3)
Mass per volume density.
Understanding the Long ton per Gallon (long ton/gal)
Mass per volume density.
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 meter?
1 pound per cubic meter equals 0.0000016899 long tons per gallon, using the exact defined conversion factor rather than an estimate.
How do I convert pound per cubic meter to long ton per gallon?
Multiply the pound per cubic meter value by 0.000001689915975. The converter above does this instantly to whatever precision you set.
How do I convert long ton per gallon back to pound per cubic meter?
Use the reverse factor: 1 long ton per gallon equals 591,745.3973 pounds per cubic meter. You can also use the swap control in the converter above to flip the direction instantly.
What is a pound per cubic meter?
Pound per Cubic Meter (lb/m3) is a unit of density.
What is a long ton per gallon?
Long ton per Gallon (long ton/gal) is a unit of density.
Is the pound per cubic meter to long ton per gallon conversion exact?
Yes. Both pound per cubic meter and long ton per gallon are defined by fixed standards rather than physical artifacts, so the factor of 0.000001689915975 used above is exact to as many digits as you choose to display.
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.