Mass per volume density.
Grams per Cup to Pounds per Gallon Converter — g/cup to lb/gal
Convert Gram per Cup (g/cup) to Pound per Gallon (lb/gal) using the exact conversion factor (1 gram per cup = 0.035273962 pound per gallon). See the formula, worked examples, conversion table, and common uses.
Grams per Cup 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 4.226752838 / 119.8264273.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Grams per Cup to Pounds per Gallon
Gram per Cup 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 = grams per cup × 0.0352739619496
This factor comes from each unit's defined relationship to the category's base unit: 1 gram per cup equals 4.22675283773 base units, and 1 pound per gallon equals 119.826427317 base units, so dividing one by the other gives the direct gram per cup-to-pound per gallon factor of 0.0352739619496.
Simple example
1 g/cup × 0.03527396195 = 0.035273962 lb/gal
1 gram per cup = 0.035273962 pounds per gallon.
Real-world example
1,000 g/cup × 0.03527396195 = 35.27396195 lb/gal
1,000 grams per cup = 35.27396195 pounds per gallon.
Conversion table
| Gram per Cup (g/cup) | Pound per Gallon (lb/gal) |
|---|---|
| 0.1 g/cup | 0.0035273962 lb/gal |
| 1 g/cup | 0.035273962 lb/gal |
| 10 g/cup | 0.3527396195 lb/gal |
| 100 g/cup | 3.527396195 lb/gal |
| 1,000 g/cup | 35.27396195 lb/gal |
| 10,000 g/cup | 352.7396195 lb/gal |
Reverse conversion: Pound per Gallon to Gram per Cup
0.035273962 lb/gal × 28.34952313 = 1.000000001 g/cup
0.035273962 pounds per gallon = 1.000000001 grams per cup.
grams per cup = pounds per gallon × 28.349523125
For a page dedicated to this direction, see Pound per Gallon to Gram per Cup.
Understanding the Gram per Cup (g/cup)
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 gram per cup?
1 gram per cup equals 0.035273962 pounds per gallon, using the exact defined conversion factor rather than an estimate.
How do I convert gram per cup to pound per gallon?
Multiply the gram per cup value by 0.03527396195. The converter above does this instantly to whatever precision you set.
How do I convert pound per gallon back to gram per cup?
Use the reverse factor: 1 pound per gallon equals 28.34952313 grams per cup. You can also use the swap control in the converter above to flip the direction instantly.
What is a gram per cup?
Gram per Cup (g/cup) 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 gram per cup to pound per gallon conversion exact?
Yes. Both gram per cup and pound per gallon are defined by fixed standards rather than physical artifacts, so the factor of 0.03527396195 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.