Mass per volume density.
Pounds per Gallon to Stones per Cup Converter — lb/gal to st/cup
Convert Pound per Gallon (lb/gal) to Stone per Cup (st/cup) using the exact conversion factor (1 pound per gallon = 0.0044642857 stone per cup). See the formula, worked examples, conversion table, and common uses.
Pounds per Gallon to Stones per Cup 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 119.8264273 / 26841.11972.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Pounds per Gallon to Stones per Cup
Pound per Gallon and Stone per Cup 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. Pound per Gallon is most often used for us paint and coatings density specifications.
Formula
stones per cup = pounds per gallon × 0.00446428571429
This factor comes from each unit's defined relationship to the category's base unit: 1 pound per gallon equals 119.826427317 base units, and 1 stone per cup equals 26841.119719 base units, so dividing one by the other gives the direct pound per gallon-to-stone per cup factor of 0.00446428571429.
Simple example
1 lb/gal × 0.004464285714 = 0.0044642857 st/cup
1 pound per gallon = 0.0044642857 stones per cup.
Real-world example
1,000 lb/gal × 0.004464285714 = 4.464285714 st/cup
1,000 pounds per gallon = 4.464285714 stones per cup.
Conversion table
| Pound per Gallon (lb/gal) | Stone per Cup (st/cup) |
|---|---|
| 0.1 lb/gal | 0.0004464286 st/cup |
| 1 lb/gal | 0.0044642857 st/cup |
| 10 lb/gal | 0.0446428571 st/cup |
| 100 lb/gal | 0.4464285714 st/cup |
| 1,000 lb/gal | 4.464285714 st/cup |
| 10,000 lb/gal | 44.64285714 st/cup |
Reverse conversion: Stone per Cup to Pound per Gallon
0.0044642857 st/cup × 224 = 0.9999999968 lb/gal
0.0044642857 stones per cup = 0.9999999968 pounds per gallon.
pounds per gallon = stones per cup × 224
For a page dedicated to this direction, see Stone per Cup to Pound per Gallon.
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
Understanding the Stone per Cup (st/cup)
Mass per volume density.
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 stones per cup are in 1 pound per gallon?
1 pound per gallon equals 0.0044642857 stones per cup, using the exact defined conversion factor rather than an estimate.
How do I convert pound per gallon to stone per cup?
Multiply the pound per gallon value by 0.004464285714. The converter above does this instantly to whatever precision you set.
How do I convert stone per cup back to pound per gallon?
Use the reverse factor: 1 stone per cup equals 224 pounds per gallon. You can also use the swap control in the converter above to flip the direction instantly.
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.
What is a stone per cup?
Stone per Cup (st/cup) is a unit of density.
Is the pound per gallon to stone per cup conversion exact?
Yes. Both pound per gallon and stone per cup are defined by fixed standards rather than physical artifacts, so the factor of 0.004464285714 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.
Where is the pound per gallon still used today?
United States (paint, fuel, and industrial liquid density specifications)