Mass per volume density.
Hectograms per Imperial gallon to Pounds per Gallon Converter — hg/imp gal to lb/gal
Convert Hectogram per Imperial gallon (hg/imp gal) to Pound per Gallon (lb/gal) using the exact conversion factor (1 hectogram per imperial gallon = 0.1835732344 pound per gallon). See the formula, worked examples, conversion table, and common uses.
Hectograms per Imperial gallon 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 21.99692483 / 119.8264273.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Hectograms per Imperial gallon to Pounds per Gallon
Hectogram per Imperial gallon 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 = hectograms per imperial gallon × 0.183573234406
This factor comes from each unit's defined relationship to the category's base unit: 1 hectogram per imperial gallon equals 21.9969248299 base units, and 1 pound per gallon equals 119.826427317 base units, so dividing one by the other gives the direct hectogram per imperial gallon-to-pound per gallon factor of 0.183573234406.
Simple example
1 hg/imp gal × 0.1835732344 = 0.1835732344 lb/gal
1 hectogram per imperial gallon = 0.1835732344 pounds per gallon.
Real-world example
1,000 hg/imp gal × 0.1835732344 = 183.5732344 lb/gal
1,000 hectograms per imperial gallon = 183.5732344 pounds per gallon.
Conversion table
| Hectogram per Imperial gallon (hg/imp gal) | Pound per Gallon (lb/gal) |
|---|---|
| 0.1 hg/imp gal | 0.0183573234 lb/gal |
| 1 hg/imp gal | 0.1835732344 lb/gal |
| 10 hg/imp gal | 1.835732344 lb/gal |
| 100 hg/imp gal | 18.35732344 lb/gal |
| 1,000 hg/imp gal | 183.5732344 lb/gal |
| 10,000 hg/imp gal | 1,835.732344 lb/gal |
Reverse conversion: Pound per Gallon to Hectogram per Imperial gallon
0.1835732344 lb/gal × 5.44741723 = 1 hg/imp gal
0.1835732344 pounds per gallon = 1 hectograms per imperial gallon.
hectograms per imperial gallon = pounds per gallon × 5.44741722961
For a page dedicated to this direction, see Pound per Gallon to Hectogram per Imperial gallon.
Understanding the Hectogram per Imperial gallon (hg/imp gal)
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 hectogram per imperial gallon?
1 hectogram per imperial gallon equals 0.1835732344 pounds per gallon, using the exact defined conversion factor rather than an estimate.
How do I convert hectogram per imperial gallon to pound per gallon?
Multiply the hectogram per imperial gallon value by 0.1835732344. The converter above does this instantly to whatever precision you set.
How do I convert pound per gallon back to hectogram per imperial gallon?
Use the reverse factor: 1 pound per gallon equals 5.44741723 hectograms per imperial gallon. You can also use the swap control in the converter above to flip the direction instantly.
What is a hectogram per imperial gallon?
Hectogram per Imperial gallon (hg/imp gal) 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 hectogram per imperial gallon to pound per gallon conversion exact?
Yes. Both hectogram per imperial gallon and pound per gallon are defined by fixed standards rather than physical artifacts, so the factor of 0.1835732344 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.