Mass per volume density.
Slugs per Pint to Pounds per Gallon Converter — slug/pt to lb/gal
Convert Slug per Pint (slug/pt) to Pound per Gallon (lb/gal) using the exact conversion factor (1 slug per pint = 257.3923885 pound per gallon). See the formula, worked examples, conversion table, and common uses.
Slugs per Pint to Pounds 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 30842.41033 / 119.8264273.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Slugs per Pint to Pounds per Gallon
Slug per Pint and Pound 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
pounds per gallon = slugs per pint × 257.392388451
This factor comes from each unit's defined relationship to the category's base unit: 1 slug per pint equals 30842.4103267 base units, and 1 pound per gallon equals 119.826427317 base units, so dividing one by the other gives the direct slug per pint-to-pound per gallon factor of 257.392388451.
Simple example
1 slug/pt × 257.3923885 = 257.3923885 lb/gal
1 slug per pint = 257.3923885 pounds per gallon.
Real-world example
1,000 slug/pt × 257.3923885 = 257,392.3885 lb/gal
1,000 slugs per pint = 257,392.3885 pounds per gallon.
Conversion table
| Slug per Pint (slug/pt) | Pound per Gallon (lb/gal) |
|---|---|
| 0.1 slug/pt | 25.73923885 lb/gal |
| 1 slug/pt | 257.3923885 lb/gal |
| 10 slug/pt | 2,573.923885 lb/gal |
| 100 slug/pt | 25,739.23885 lb/gal |
| 1,000 slug/pt | 257,392.3885 lb/gal |
| 10,000 slug/pt | 2,573,923.885 lb/gal |
Reverse conversion: Pound per Gallon to Slug per Pint
257.3923885 lb/gal × 0.003885118771 = 1 slug/pt
257.3923885 pounds per gallon = 1 slugs per pint.
slugs per pint = pounds per gallon × 0.00388511877145
For a page dedicated to this direction, see Pound per Gallon to Slug per Pint.
Understanding the Slug per Pint (slug/pt)
Mass per volume density.
Understanding the Pound per Gallon
Pound per Gallon (lb/gal) measures density. The US customary unit for liquid density, based on the US gallon (231 cubic inches). It is classified as a US customary density unit.
Where it's used: United States (paint, fuel, and industrial liquid density specifications)
lb/gal vs. lb/ft³. Both are US customary density units; they're related through the real, fixed relationship between the US gallon and the cubic foot (1 cubic foot ≈ 7.48 US gallons), not a round conversion factor.
Uses of the Pound per Gallon today
- US paint and coatings density specifications
- US fuel and petroleum liquid density specs
- Industrial liquid handling and shipping weight calculations
Pound per Gallon — sources
- NIST Handbook 44 — General tables of units including US customary density measures.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many pounds per gallon are in 1 slug per pint?
1 slug per pint equals 257.3923885 pounds per gallon, using the exact defined conversion factor rather than an estimate.
How do I convert slug per pint to pound per gallon?
Multiply the slug per pint value by 257.3923885. The converter above does this instantly to whatever precision you set.
How do I convert pound per gallon back to slug per pint?
Use the reverse factor: 1 pound per gallon equals 0.0038851188 slugs per pint. You can also use the swap control in the converter above to flip the direction instantly.
What is a slug per pint?
Slug per Pint (slug/pt) is a unit of density.
What is a pound per gallon?
Pound per Gallon (lb/gal) measures density. The US customary unit for liquid density, based on the US gallon (231 cubic inches). It is classified as a US customary density unit.
Is the slug per pint to pound per gallon conversion exact?
Yes. Both slug per pint and pound per gallon are defined by fixed standards rather than physical artifacts, so the factor of 257.3923885 used above is exact to as many digits as you choose to display.
What is the difference between lb/gal vs. lb/ft³?
Both are US customary density units; they're related through the real, fixed relationship between the US gallon and the cubic foot (1 cubic foot ≈ 7.48 US gallons), not a round conversion factor.