Mass per volume density.
Long tons per Gallon to Stones per Cubic Millimeter Converter — long ton/gal to st/mm3
Convert Long ton per Gallon (long ton/gal) to Stone per Cubic Millimeter (st/mm3) using the exact conversion factor (1 long ton per gallon = 0.0000422675 stone per cubic millimeter). See the formula, worked examples, and conversion table.
Long tons per Gallon to Stones per Cubic Millimeter 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 268411.1972 / 6.35029318e+9.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Long tons per Gallon to Stones per Cubic Millimeter
Long ton per Gallon and Stone per Cubic Millimeter 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 cubic millimeter = long tons per gallon × 0.0000422675283773
This factor comes from each unit's defined relationship to the category's base unit: 1 long ton per gallon equals 268411.19719 base units, and 1 stone per cubic millimeter equals 6350293180 base units, so dividing one by the other gives the direct long ton per gallon-to-stone per cubic millimeter factor of 0.0000422675283773.
Simple example
1 long ton/gal × 0.00004226752838 = 0.0000422675 st/mm3
1 long ton per gallon = 0.0000422675 stones per cubic millimeter.
Real-world example
1,000 long ton/gal × 0.00004226752838 = 0.0422675284 st/mm3
1,000 long tons per gallon = 0.0422675284 stones per cubic millimeter.
Conversion table
| Long ton per Gallon (long ton/gal) | Stone per Cubic Millimeter (st/mm3) |
|---|---|
| 0.1 long ton/gal | 0.0000042268 st/mm3 |
| 1 long ton/gal | 0.0000422675 st/mm3 |
| 10 long ton/gal | 0.0004226753 st/mm3 |
| 100 long ton/gal | 0.0042267528 st/mm3 |
| 1,000 long ton/gal | 0.0422675284 st/mm3 |
| 10,000 long ton/gal | 0.4226752838 st/mm3 |
Reverse conversion: Stone per Cubic Millimeter to Long ton per Gallon
0.0000422675 st/mm3 × 23658.82365 = 0.9999993286 long ton/gal
0.0000422675 stones per cubic millimeter = 0.9999993286 long tons per gallon.
long tons per gallon = stones per cubic millimeter × 23658.82365
For a page dedicated to this direction, see Stone per Cubic Millimeter to Long ton per Gallon.
Understanding the Long ton per Gallon (long ton/gal)
Mass per volume density.
Understanding the Stone per Cubic Millimeter (st/mm3)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many stones per cubic millimeter are in 1 long ton per gallon?
1 long ton per gallon equals 0.0000422675 stones per cubic millimeter, using the exact defined conversion factor rather than an estimate.
How do I convert long ton per gallon to stone per cubic millimeter?
Multiply the long ton per gallon value by 0.00004226752838. The converter above does this instantly to whatever precision you set.
How do I convert stone per cubic millimeter back to long ton per gallon?
Use the reverse factor: 1 stone per cubic millimeter equals 23,658.82365 long tons per gallon. You can also use the swap control in the converter above to flip the direction instantly.
What is a long ton per gallon?
Long ton per Gallon (long ton/gal) is a unit of density.
What is a stone per cubic millimeter?
Stone per Cubic Millimeter (st/mm3) is a unit of density.
Is the long ton per gallon to stone per cubic millimeter conversion exact?
Yes. Both long ton per gallon and stone per cubic millimeter are defined by fixed standards rather than physical artifacts, so the factor of 0.00004226752838 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.