Mass per volume density.
Pounds per Imperial gallon to Stone per Cubic inches Converter — lb/imp gal to st/in3
Convert Pound per Imperial gallon (lb/imp gal) to Stone per Cubic inch (st/in3) using the exact conversion factor (1 pound per imperial gallon = 0.000257475 stone per cubic inch). See the formula, worked examples, and conversion table.
Pounds per Imperial gallon to Stone per Cubic inches 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 99.77637266 / 387518.6659.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Pounds per Imperial gallon to Stone per Cubic inches
Pound per Imperial gallon and Stone per Cubic inch 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
stone per cubic inches = pounds per imperial gallon × 0.000257475010708
This factor comes from each unit's defined relationship to the category's base unit: 1 pound per imperial gallon equals 99.7763726631 base units, and 1 stone per cubic inch equals 387518.665943 base units, so dividing one by the other gives the direct pound per imperial gallon-to-stone per cubic inch factor of 0.000257475010708.
Simple example
1 lb/imp gal × 0.0002574750107 = 0.000257475 st/in3
1 pound per imperial gallon = 0.000257475 stone per cubic inches.
Real-world example
1,000 lb/imp gal × 0.0002574750107 = 0.2574750107 st/in3
1,000 pounds per imperial gallon = 0.2574750107 stone per cubic inches.
Conversion table
| Pound per Imperial gallon (lb/imp gal) | Stone per Cubic inch (st/in3) |
|---|---|
| 0.1 lb/imp gal | 0.0000257475 st/in3 |
| 1 lb/imp gal | 0.000257475 st/in3 |
| 10 lb/imp gal | 0.0025747501 st/in3 |
| 100 lb/imp gal | 0.0257475011 st/in3 |
| 1,000 lb/imp gal | 0.2574750107 st/in3 |
| 10,000 lb/imp gal | 2.574750107 st/in3 |
Reverse conversion: Stone per Cubic inch to Pound per Imperial gallon
0.000257475 st/in3 × 3883.872059 = 0.9999999584 lb/imp gal
0.000257475 stone per cubic inches = 0.9999999584 pounds per imperial gallon.
pounds per imperial gallon = stone per cubic inches × 3883.87205908
For a page dedicated to this direction, see Stone per Cubic inch to Pound per Imperial gallon.
Understanding the Pound per Imperial gallon (lb/imp gal)
Mass per volume density.
Understanding the Stone per Cubic inch (st/in3)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many stone per cubic inches are in 1 pound per imperial gallon?
1 pound per imperial gallon equals 0.000257475 stone per cubic inches, using the exact defined conversion factor rather than an estimate.
How do I convert pound per imperial gallon to stone per cubic inch?
Multiply the pound per imperial gallon value by 0.0002574750107. The converter above does this instantly to whatever precision you set.
How do I convert stone per cubic inch back to pound per imperial gallon?
Use the reverse factor: 1 stone per cubic inch equals 3,883.872059 pounds per imperial gallon. You can also use the swap control in the converter above to flip the direction instantly.
What is a pound per imperial gallon?
Pound per Imperial gallon (lb/imp gal) is a unit of density.
What is a stone per cubic inch?
Stone per Cubic inch (st/in3) is a unit of density.
Is the pound per imperial gallon to stone per cubic inch conversion exact?
Yes. Both pound per imperial gallon and stone per cubic inch are defined by fixed standards rather than physical artifacts, so the factor of 0.0002574750107 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.