Mass per volume density.
Long tons per Quart to Stones per Gallon Converter — long ton/qt to st/gal
Convert Long ton per Quart (long ton/qt) to Stone per Gallon (st/gal) using the exact conversion factor (1 long ton per quart = 640 stone per gallon). See the formula, worked examples, and conversion table.
Long tons per Quart to Stones 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 1.07364479e+6 / 1677.569982.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Long tons per Quart to Stones per Gallon
Long ton per Quart and Stone 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
stones per gallon = long tons per quart × 640
This factor comes from each unit's defined relationship to the category's base unit: 1 long ton per quart equals 1073644.78876 base units, and 1 stone per gallon equals 1677.56998244 base units, so dividing one by the other gives the direct long ton per quart-to-stone per gallon factor of 640.
Simple example
1 long ton/qt × 640 = 640 st/gal
1 long ton per quart = 640 stones per gallon.
Real-world example
1,000 long ton/qt × 640 = 640,000 st/gal
1,000 long tons per quart = 640,000 stones per gallon.
Conversion table
| Long ton per Quart (long ton/qt) | Stone per Gallon (st/gal) |
|---|---|
| 0.1 long ton/qt | 64 st/gal |
| 1 long ton/qt | 640 st/gal |
| 10 long ton/qt | 6,400 st/gal |
| 100 long ton/qt | 64,000 st/gal |
| 1,000 long ton/qt | 640,000 st/gal |
| 10,000 long ton/qt | 6,400,000 st/gal |
Reverse conversion: Stone per Gallon to Long ton per Quart
640 st/gal × 0.0015625 = 1 long ton/qt
640 stones per gallon = 1 long tons per quart.
long tons per quart = stones per gallon × 0.0015625
For a page dedicated to this direction, see Stone per Gallon to Long ton per Quart.
Understanding the Long ton per Quart (long ton/qt)
Mass per volume density.
Understanding the Stone per Gallon (st/gal)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many stones per gallon are in 1 long ton per quart?
1 long ton per quart equals 640 stones per gallon, using the exact defined conversion factor rather than an estimate.
How do I convert long ton per quart to stone per gallon?
Multiply the long ton per quart value by 640. The converter above does this instantly to whatever precision you set.
How do I convert stone per gallon back to long ton per quart?
Use the reverse factor: 1 stone per gallon equals 0.0015625 long tons per quart. You can also use the swap control in the converter above to flip the direction instantly.
What is a long ton per quart?
Long ton per Quart (long ton/qt) is a unit of density.
What is a stone per gallon?
Stone per Gallon (st/gal) is a unit of density.
Is the long ton per quart to stone per gallon conversion exact?
Yes. Both long ton per quart and stone per gallon are defined by fixed standards rather than physical artifacts, so the factor of 640 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.