Mass concentration.
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
Chemistry Converter
Convert concentration, molarity, amount, and laboratory scientific units by compatible family.
Context values
Some unit families need one extra value for a physically accurate result.
Mass concentration.
Result = input x 119.8264273 / 264.1720524.
Mass Concentration units are compatible.
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 mass concentration — how much of a substance is dissolved or dispersed in a given volume — a core calculation for preparing lab solutions, checking water quality against a regulatory limit, or formulating a pharmaceutical dose. 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
100 lb/gal × 0.45359237 = 45.359237 kg/gal
100 pounds per gallon = 45.359237 kilograms per gallon.
Conversion table
| Pound per Gallon (lb/gal) | Kilogram per Gallon (kg/gal) |
|---|---|
| 0.001 lb/gal | 0.0004535924 kg/gal |
| 0.01 lb/gal | 0.0045359237 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 |
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)