Mass per volume density.
Pounds per Gallon to Kilograms per Gallon Converter — lb/gal to kg/gal
Convert Pound per Gallon (lb/gal) to Kilogram per Gallon (kg/gal) using the exact conversion factor (1 pound per gallon = 0.45359237 kilogram per gallon). See the formula, worked examples, conversion table, unit comparison, and common uses.
Pounds per Gallon to Kilograms 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 119.8264273 / 264.1720524.
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 Kilograms per Gallon
Pound per Gallon and Kilogram 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. Pound per Gallon is most often used for us paint and coatings density specifications.
Formula
kilograms per gallon = pounds per gallon × 0.45359237
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 kilogram per gallon equals 264.172052358 base units, so dividing one by the other gives the direct pound per gallon-to-kilogram per gallon factor of 0.45359237.
Simple example
1 lb/gal × 0.45359237 = 0.45359237 kg/gal
1 pound per gallon = 0.45359237 kilograms per gallon.
Real-world example
1,000 lb/gal × 0.45359237 = 453.59237 kg/gal
1,000 pounds per gallon = 453.59237 kilograms per gallon.
Conversion table
| Pound per Gallon (lb/gal) | Kilogram per Gallon (kg/gal) |
|---|---|
| 0.1 lb/gal | 0.045359237 kg/gal |
| 1 lb/gal | 0.45359237 kg/gal |
| 10 lb/gal | 4.5359237 kg/gal |
| 100 lb/gal | 45.359237 kg/gal |
| 1,000 lb/gal | 453.59237 kg/gal |
| 10,000 lb/gal | 4,535.9237 kg/gal |
Reverse conversion: Kilogram per Gallon to Pound per Gallon
0.45359237 kg/gal × 2.204622622 = 1 lb/gal
0.45359237 kilograms per gallon = 1 pound per gallon.
pounds per gallon = kilograms per gallon × 2.20462262185
For a page dedicated to this direction, see Kilogram per Gallon to Pound per Gallon.
Pound per Gallon vs. Kilogram per Gallon
| Aspect | Pound per Gallon | Kilogram per Gallon |
|---|---|---|
| Family | US customary density unit | mixed metric/US customary density unit |
| Typical use | US paint and coatings density specifications | Can be used to express liquid density such as fuel or industrial liquids in kilograms per gallon — in practice, kilograms per liter (metric) and pounds per gallon (US customary) are the specific pairings more commonly seen in fuel and liquid-density references |
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 Kilogram per Gallon
Kilogram per Gallon (kg/gal) measures density. A mathematically valid way to express liquid density in kilograms per US gallon. It is classified as a mixed metric/US customary density unit.
Uses of the Kilogram per Gallon today
- Can be used to express liquid density such as fuel or industrial liquids in kilograms per gallon — in practice, kilograms per liter (metric) and pounds per gallon (US customary) are the specific pairings more commonly seen in fuel and liquid-density references
Pound per Gallon — sources
- NIST Handbook 44 — General tables of units including US customary density measures.
Kilogram per Gallon — sources
- Fuel and petroleum liquid-density references — Liquid density figures for fuels are typically reported in kg/L, kg/m³, or lb/gal rather than kg/gal.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many kilograms per gallon are in 1 pound per gallon?
1 pound per gallon equals 0.45359237 kilograms per gallon, using the exact defined conversion factor rather than an estimate.
How do I convert pound per gallon to kilogram per gallon?
Multiply the pound per gallon value by 0.45359237. The converter above does this instantly to whatever precision you set.
How do I convert kilogram per gallon back to pound per gallon?
Use the reverse factor: 1 kilogram per gallon equals 2.204622622 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 kilogram per gallon?
Kilogram per Gallon (kg/gal) measures density. A mathematically valid way to express liquid density in kilograms per US gallon. It is classified as a mixed metric/US customary density unit.
Is the pound per gallon to kilogram per gallon conversion exact?
Yes. Both pound per gallon and kilogram per gallon are defined by fixed standards rather than physical artifacts, so the factor of 0.45359237 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)