Mass per volume density.
Pounds per Imperial gallon to Slugs per Gallon Converter — lb/imp gal to slug/gal
Convert Pound per Imperial gallon (lb/imp gal) to Slug per Gallon (slug/gal) using the exact conversion factor (1 pound per imperial gallon = 0.0258803048 slug per gallon). See the formula, worked examples, and conversion table.
Pounds per Imperial gallon to Slugs 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 99.77637266 / 3855.301291.
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 Slugs per Gallon
Pound per Imperial gallon and Slug 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
slugs per gallon = pounds per imperial gallon × 0.0258803048416
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 slug per gallon equals 3855.30129084 base units, so dividing one by the other gives the direct pound per imperial gallon-to-slug per gallon factor of 0.0258803048416.
Simple example
1 lb/imp gal × 0.02588030484 = 0.0258803048 slug/gal
1 pound per imperial gallon = 0.0258803048 slugs per gallon.
Real-world example
1,000 lb/imp gal × 0.02588030484 = 25.88030484 slug/gal
1,000 pounds per imperial gallon = 25.88030484 slugs per gallon.
Conversion table
| Pound per Imperial gallon (lb/imp gal) | Slug per Gallon (slug/gal) |
|---|---|
| 0.1 lb/imp gal | 0.0025880305 slug/gal |
| 1 lb/imp gal | 0.0258803048 slug/gal |
| 10 lb/imp gal | 0.2588030484 slug/gal |
| 100 lb/imp gal | 2.588030484 slug/gal |
| 1,000 lb/imp gal | 25.88030484 slug/gal |
| 10,000 lb/imp gal | 258.8030484 slug/gal |
Reverse conversion: Slug per Gallon to Pound per Imperial gallon
0.0258803048 slug/gal × 38.63942122 = 0.9999999984 lb/imp gal
0.0258803048 slugs per gallon = 0.9999999984 pounds per imperial gallon.
pounds per imperial gallon = slugs per gallon × 38.639421217
For a page dedicated to this direction, see Slug per Gallon to Pound per Imperial gallon.
Understanding the Pound per Imperial gallon (lb/imp gal)
Mass per volume density.
Understanding the Slug per Gallon (slug/gal)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many slugs per gallon are in 1 pound per imperial gallon?
1 pound per imperial gallon equals 0.0258803048 slugs per gallon, using the exact defined conversion factor rather than an estimate.
How do I convert pound per imperial gallon to slug per gallon?
Multiply the pound per imperial gallon value by 0.02588030484. The converter above does this instantly to whatever precision you set.
How do I convert slug per gallon back to pound per imperial gallon?
Use the reverse factor: 1 slug per gallon equals 38.63942122 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 slug per gallon?
Slug per Gallon (slug/gal) is a unit of density.
Is the pound per imperial gallon to slug per gallon conversion exact?
Yes. Both pound per imperial gallon and slug per gallon are defined by fixed standards rather than physical artifacts, so the factor of 0.02588030484 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.