Mass per volume density.
Pounds per Quart to Long tons per Gallon Converter — lb/qt to long ton/gal
Convert Pound per Quart (lb/qt) to Long ton per Gallon (long ton/gal) using the exact conversion factor (1 pound per quart = 0.0017857143 long ton per gallon). See the formula, worked examples, and conversion table.
Pounds per Quart 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 479.3057093 / 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 Quart to Long tons per Gallon
Pound per Quart 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 quart × 0.00178571428571
This factor comes from each unit's defined relationship to the category's base unit: 1 pound per quart equals 479.305709268 base units, and 1 long ton per gallon equals 268411.19719 base units, so dividing one by the other gives the direct pound per quart-to-long ton per gallon factor of 0.00178571428571.
Simple example
1 lb/qt × 0.001785714286 = 0.0017857143 long ton/gal
1 pound per quart = 0.0017857143 long tons per gallon.
Real-world example
1,000 lb/qt × 0.001785714286 = 1.785714286 long ton/gal
1,000 pounds per quart = 1.785714286 long tons per gallon.
Conversion table
| Pound per Quart (lb/qt) | Long ton per Gallon (long ton/gal) |
|---|---|
| 0.1 lb/qt | 0.0001785714 long ton/gal |
| 1 lb/qt | 0.0017857143 long ton/gal |
| 10 lb/qt | 0.0178571429 long ton/gal |
| 100 lb/qt | 0.1785714286 long ton/gal |
| 1,000 lb/qt | 1.785714286 long ton/gal |
| 10,000 lb/qt | 17.85714286 long ton/gal |
Reverse conversion: Long ton per Gallon to Pound per Quart
0.0017857143 long ton/gal × 560 = 1.000000008 lb/qt
0.0017857143 long tons per gallon = 1.000000008 pounds per quart.
pounds per quart = long tons per gallon × 560
For a page dedicated to this direction, see Long ton per Gallon to Pound per Quart.
Understanding the Pound per Quart (lb/qt)
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 quart?
1 pound per quart equals 0.0017857143 long tons per gallon, using the exact defined conversion factor rather than an estimate.
How do I convert pound per quart to long ton per gallon?
Multiply the pound per quart value by 0.001785714286. The converter above does this instantly to whatever precision you set.
How do I convert long ton per gallon back to pound per quart?
Use the reverse factor: 1 long ton per gallon equals 560 pounds per quart. You can also use the swap control in the converter above to flip the direction instantly.
What is a pound per quart?
Pound per Quart (lb/qt) 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 quart to long ton per gallon conversion exact?
Yes. Both pound per quart and long ton per gallon are defined by fixed standards rather than physical artifacts, so the factor of 0.001785714286 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.