Mass per volume density.
Stones per Gallon to Imperial hundredweights per Gallon Converter — st/gal to long cwt/gal
Convert Stone per Gallon (st/gal) to Imperial hundredweight per Gallon (long cwt/gal) using the exact conversion factor (1 stone per gallon = 0.125 imperial hundredweight per gallon). See the formula, worked examples, and conversion table.
Stones per Gallon to Imperial hundredweights 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 1677.569982 / 13420.55986.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Stones per Gallon to Imperial hundredweights per Gallon
Stone per Gallon and Imperial hundredweight 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
imperial hundredweights per gallon = stones per gallon × 0.125
This factor comes from each unit's defined relationship to the category's base unit: 1 stone per gallon equals 1677.56998244 base units, and 1 imperial hundredweight per gallon equals 13420.5598595 base units, so dividing one by the other gives the direct stone per gallon-to-imperial hundredweight per gallon factor of 0.125.
Simple example
1 st/gal × 0.125 = 0.125 long cwt/gal
1 stone per gallon = 0.125 imperial hundredweights per gallon.
Real-world example
1,000 st/gal × 0.125 = 125 long cwt/gal
1,000 stones per gallon = 125 imperial hundredweights per gallon.
Conversion table
| Stone per Gallon (st/gal) | Imperial hundredweight per Gallon (long cwt/gal) |
|---|---|
| 0.1 st/gal | 0.0125 long cwt/gal |
| 1 st/gal | 0.125 long cwt/gal |
| 10 st/gal | 1.25 long cwt/gal |
| 100 st/gal | 12.5 long cwt/gal |
| 1,000 st/gal | 125 long cwt/gal |
| 10,000 st/gal | 1,250 long cwt/gal |
Reverse conversion: Imperial hundredweight per Gallon to Stone per Gallon
0.125 long cwt/gal × 8 = 1 st/gal
0.125 imperial hundredweights per gallon = 1 stone per gallon.
stones per gallon = imperial hundredweights per gallon × 8
For a page dedicated to this direction, see Imperial hundredweight per Gallon to Stone per Gallon.
Understanding the Stone per Gallon (st/gal)
Mass per volume density.
Understanding the Imperial hundredweight per Gallon (long cwt/gal)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many imperial hundredweights per gallon are in 1 stone per gallon?
1 stone per gallon equals 0.125 imperial hundredweights per gallon, using the exact defined conversion factor rather than an estimate.
How do I convert stone per gallon to imperial hundredweight per gallon?
Multiply the stone per gallon value by 0.125. The converter above does this instantly to whatever precision you set.
How do I convert imperial hundredweight per gallon back to stone per gallon?
Use the reverse factor: 1 imperial hundredweight per gallon equals 8 stones per gallon. You can also use the swap control in the converter above to flip the direction instantly.
What is a stone per gallon?
Stone per Gallon (st/gal) is a unit of density.
What is a imperial hundredweight per gallon?
Imperial hundredweight per Gallon (long cwt/gal) is a unit of density.
Is the stone per gallon to imperial hundredweight per gallon conversion exact?
Yes. Both stone per gallon and imperial hundredweight per gallon are defined by fixed standards rather than physical artifacts, so the factor of 0.125 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.