Mass per volume density.
Grams per Cubic Millimeter to Pounds per Gallon Converter — g/mm3 to lb/gal
Convert Gram per Cubic Millimeter (g/mm3) to Pound per Gallon (lb/gal) using the exact conversion factor (1 gram per cubic millimeter = 8,345.404452 pound per gallon). See the formula, worked examples, conversion table, and common uses.
Grams per Cubic Millimeter 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 1e+6 / 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 Cubic Millimeter to Pounds per Gallon
Gram per Cubic Millimeter 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 cubic millimeter × 8345.40445202
This factor comes from each unit's defined relationship to the category's base unit: 1 gram per cubic millimeter equals 1000000 base units, and 1 pound per gallon equals 119.826427317 base units, so dividing one by the other gives the direct gram per cubic millimeter-to-pound per gallon factor of 8345.40445202.
Simple example
1 g/mm3 × 8345.404452 = 8,345.404452 lb/gal
1 gram per cubic millimeter = 8,345.404452 pounds per gallon.
Real-world example
1,000 g/mm3 × 8345.404452 = 8,345,404.452 lb/gal
1,000 grams per cubic millimeter = 8,345,404.452 pounds per gallon.
Conversion table
| Gram per Cubic Millimeter (g/mm3) | Pound per Gallon (lb/gal) |
|---|---|
| 0.1 g/mm3 | 834.5404452 lb/gal |
| 1 g/mm3 | 8,345.404452 lb/gal |
| 10 g/mm3 | 83,454.04452 lb/gal |
| 100 g/mm3 | 834,540.4452 lb/gal |
| 1,000 g/mm3 | 8,345,404.452 lb/gal |
| 10,000 g/mm3 | 83,454,044.52 lb/gal |
Reverse conversion: Pound per Gallon to Gram per Cubic Millimeter
1 lb/gal × 0.0001198264273 = 0.0001198264 g/mm3
1 pound per gallon = 0.0001198264 grams per cubic millimeter.
grams per cubic millimeter = pounds per gallon × 0.000119826427317
For a page dedicated to this direction, see Pound per Gallon to Gram per Cubic Millimeter.
Understanding the Gram per Cubic Millimeter (g/mm3)
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 cubic millimeter?
1 gram per cubic millimeter equals 8,345.404452 pounds per gallon, using the exact defined conversion factor rather than an estimate.
How do I convert gram per cubic millimeter to pound per gallon?
Multiply the gram per cubic millimeter value by 8345.404452. The converter above does this instantly to whatever precision you set.
How do I convert pound per gallon back to gram per cubic millimeter?
Use the reverse factor: 1 pound per gallon equals 0.0001198264 grams per cubic millimeter. You can also use the swap control in the converter above to flip the direction instantly.
What is a gram per cubic millimeter?
Gram per Cubic Millimeter (g/mm3) 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 cubic millimeter to pound per gallon conversion exact?
Yes. Both gram per cubic millimeter and pound per gallon are defined by fixed standards rather than physical artifacts, so the factor of 8345.404452 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.