Mass per volume density.
Pounds per Gallon to Hectograms per Quart Converter — lb/gal to hg/qt
Convert Pound per Gallon (lb/gal) to Hectogram per Quart (hg/qt) using the exact conversion factor (1 pound per gallon = 1.133980925 hectogram per quart). See the formula, worked examples, conversion table, and common uses.
Pounds per Gallon to Hectograms per Quart 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 / 105.6688209.
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 Hectograms per Quart
Pound per Gallon and Hectogram per Quart 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
hectograms per quart = pounds per gallon × 1.133980925
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 hectogram per quart equals 105.668820943 base units, so dividing one by the other gives the direct pound per gallon-to-hectogram per quart factor of 1.133980925.
Simple example
1 lb/gal × 1.133980925 = 1.133980925 hg/qt
1 pound per gallon = 1.133980925 hectograms per quart.
Real-world example
1,000 lb/gal × 1.133980925 = 1,133.980925 hg/qt
1,000 pounds per gallon = 1,133.980925 hectograms per quart.
Conversion table
| Pound per Gallon (lb/gal) | Hectogram per Quart (hg/qt) |
|---|---|
| 0.1 lb/gal | 0.1133980925 hg/qt |
| 1 lb/gal | 1.133980925 hg/qt |
| 10 lb/gal | 11.33980925 hg/qt |
| 100 lb/gal | 113.3980925 hg/qt |
| 1,000 lb/gal | 1,133.980925 hg/qt |
| 10,000 lb/gal | 11,339.80925 hg/qt |
Reverse conversion: Hectogram per Quart to Pound per Gallon
1.133980925 hg/qt × 0.8818490487 = 1 lb/gal
1.133980925 hectograms per quart = 1 pounds per gallon.
pounds per gallon = hectograms per quart × 0.88184904874
For a page dedicated to this direction, see Hectogram per Quart 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 Hectogram per Quart (hg/qt)
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 hectograms per quart are in 1 pound per gallon?
1 pound per gallon equals 1.133980925 hectograms per quart, using the exact defined conversion factor rather than an estimate.
How do I convert pound per gallon to hectogram per quart?
Multiply the pound per gallon value by 1.133980925. The converter above does this instantly to whatever precision you set.
How do I convert hectogram per quart back to pound per gallon?
Use the reverse factor: 1 hectogram per quart equals 0.8818490487 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 hectogram per quart?
Hectogram per Quart (hg/qt) is a unit of density.
Is the pound per gallon to hectogram per quart conversion exact?
Yes. Both pound per gallon and hectogram per quart are defined by fixed standards rather than physical artifacts, so the factor of 1.133980925 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)