Gram per cubic centimeter to Pound per US gallon Conversion Table
| Gram per cubic centimeter (g/cm3) | Pound per US gallon (lb/gal) | Reference Benchmark | Formula Step |
|---|---|---|---|
| 0.001225 g/cm³ | 0.0102 lb/gal | Dry atmospheric air at standard temperature and pressure | 0.001225 × 8.3454 = 0.0102 lb/gal |
| 0.68 g/cm³ | 5.675 lb/gal | Automotive gasoline motor fuel blend | 0.68 × 8.3454 = 5.675 lb/gal |
| 0.789 g/cm³ | 6.585 lb/gal | Pure ethyl alcohol chemical solvent | 0.789 × 8.3454 = 6.585 lb/gal |
| 0.84 g/cm³ | 7.01 lb/gal | Standard diesel fuel #2 commercial grade | 0.84 × 8.3454 = 7.01 lb/gal |
| 0.88 g/cm³ | 7.344 lb/gal | Industrial hydraulic lubricant oil | 0.88 × 8.3454 = 7.344 lb/gal |
| 0.917 g/cm³ | 7.653 lb/gal | Solid pure water ice crystal structure | 0.917 × 8.3454 = 7.653 lb/gal |
| 0.92 g/cm³ | 7.678 lb/gal | Refined edible vegetable cooking oil | 0.92 × 8.3454 = 7.678 lb/gal |
| 0.998 g/cm³ | 8.329 lb/gal | Liquid water density at ambient 20°C | 0.998 × 8.3454 = 8.329 lb/gal |
| 1 g/cm³ | 8.345 lb/gal | Pure liquid water density baseline at 4°C | 1 × 8.3454 = 8.345 lb/gal |
| 1.03 g/cm³ | 8.596 lb/gal | Average ocean seawater salinity benchmark | 1.03 × 8.3454 = 8.596 lb/gal |
| 1.11 g/cm³ | 9.263 lb/gal | Pure ethylene glycol automotive coolant | 1.11 × 8.3454 = 9.263 lb/gal |
| 1.26 g/cm³ | 10.515 lb/gal | Pharmaceutical grade vegetable glycerin | 1.26 × 8.3454 = 10.515 lb/gal |
| 1.35 g/cm³ | 11.266 lb/gal | Commercial architectural latex wall paint | 1.35 × 8.3454 = 11.266 lb/gal |
| 1.42 g/cm³ | 11.851 lb/gal | Concentrated nitric acid industrial solution | 1.42 × 8.3454 = 11.851 lb/gal |
| 1.84 g/cm³ | 15.356 lb/gal | Concentrated sulfuric acid electrolyte grade | 1.84 × 8.3454 = 15.356 lb/gal |
| 13.55 g/cm³ | 113.08 lb/gal | Elemental liquid mercury metal at room temperature | 13.55 × 8.3454 = 113.08 lb/gal |
Gram per cubic centimeter to Pound per US gallon Formula & Unit Definitions
The exact ratio originates from the definitions of the US liquid gallon and the international avoirdupois pound: 1 US gallon equals exactly 231 cubic inches, or approximately 3,785.411784 cubic centimeters. One pound equals 453.59237 grams. Dividing gallon volume by pound mass yields 3,785.411784 / 453.59237 ≈ 8.34540447 lb/gal per 1 g/cm³. Multiplying any density in g/cm³ by 8.34540447 gives the exact density in lb/gal.
Quick Estimation: To quickly convert g/cm³ to lb/gal mentally, multiply by 8.35 (or multiply by 8 and add 4%). For example, ethylene glycol at 1.11 g/cm³ equals approximately 1.11 × 8.35 ≈ 9.27 lb/gal.
Gram per cubic centimeter (g/cm3)
Source Unit- Universal CGS metric laboratory unit for measuring fluid and chemical solution densities.
- Numerically equivalent to grams per milliliter (g/mL) and kilograms per liter (kg/L).
- Calibrated around pure liquid water, which maintains ~1.000 g/cm³ at standard reference temperature.
Pounds per US Gallon (lb/gal)
Target Unit- Primary industrial fluid density unit across US chemical blending, paints, coatings, and petroleum.
- Measures the actual mass weight in pounds contained within 1 US liquid gallon (231 cubic inches).
- Standard liquid benchmark where water weighs 8.34 lb/gal and standard gasoline weighs ~5.67 lb/gal.
Frequently Asked Questions
Q.What is the exact formula for g/cm³ to lb/gal?
Density (lb/gal) = Density (g/cm³) × 8.34540447. For the reverse conversion from lb/gal to g/cm³, multiply by 0.11982643.
Q.What is the physical difference between Gram per cubic centimeter and Pound per US gallon?
Gram per cubic centimeter is a metric CGS laboratory standard where water is 1.0 g/cm³, while Pound per US gallon is an American fluid process engineering unit where water is ~8.345 lb/gal.
Q.Why does one gallon of water weigh approximately 8.34 pounds?
One US gallon contains 3,785.41 milliliters. Since 1 mL of water weighs 1 gram, a full gallon of water weighs 3,785.41 grams. Dividing 3,785.41 by 453.59237 grams per pound gives approximately 8.3454 pounds.