Mass per volume density.
Stones per Quart to Long tons per Gallon Converter — st/qt to long ton/gal
Convert Stone per Quart (st/qt) to Long ton per Gallon (long ton/gal) using the exact conversion factor (1 stone per quart = 0.025 long ton per gallon). See the formula, worked examples, and conversion table.
Stones 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 6710.27993 / 268411.1972.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Stones per Quart to Long tons per Gallon
Stone 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 = stones per quart × 0.025
This factor comes from each unit's defined relationship to the category's base unit: 1 stone per quart equals 6710.27992975 base units, and 1 long ton per gallon equals 268411.19719 base units, so dividing one by the other gives the direct stone per quart-to-long ton per gallon factor of 0.025.
Simple example
1 st/qt × 0.025 = 0.025 long ton/gal
1 stone per quart = 0.025 long tons per gallon.
Real-world example
1,000 st/qt × 0.025 = 25 long ton/gal
1,000 stones per quart = 25 long tons per gallon.
Conversion table
| Stone per Quart (st/qt) | Long ton per Gallon (long ton/gal) |
|---|---|
| 0.1 st/qt | 0.0025 long ton/gal |
| 1 st/qt | 0.025 long ton/gal |
| 10 st/qt | 0.25 long ton/gal |
| 100 st/qt | 2.5 long ton/gal |
| 1,000 st/qt | 25 long ton/gal |
| 10,000 st/qt | 250 long ton/gal |
Reverse conversion: Long ton per Gallon to Stone per Quart
0.025 long ton/gal × 40 = 1 st/qt
0.025 long tons per gallon = 1 stones per quart.
stones per quart = long tons per gallon × 40
For a page dedicated to this direction, see Long ton per Gallon to Stone per Quart.
Understanding the Stone per Quart (st/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 stone per quart?
1 stone per quart equals 0.025 long tons per gallon, using the exact defined conversion factor rather than an estimate.
How do I convert stone per quart to long ton per gallon?
Multiply the stone per quart value by 0.025. The converter above does this instantly to whatever precision you set.
How do I convert long ton per gallon back to stone per quart?
Use the reverse factor: 1 long ton per gallon equals 40 stones per quart. You can also use the swap control in the converter above to flip the direction instantly.
What is a stone per quart?
Stone per Quart (st/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 stone per quart to long ton per gallon conversion exact?
Yes. Both stone per quart and long ton per gallon are defined by fixed standards rather than physical artifacts, so the factor of 0.025 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.