Density
Convert pound per cubic foot (lb/ft³) to pound per US gallon (lb/US gal). Density is mass per unit volume — it links volumetric and mass flow, sets hydrostatic head, and drives pump and relief calculations.
1 lb/ft³ = 0.1336806 lb/US gal
To convert pound per cubic foot to pound per US gallon, multiply the lb/ft³ value by 0.1336806. To go the other way, divide by 0.1336806 (or multiply by 7.48052).
| lb/ft³ | lb/US gal |
|---|---|
| 1 | 0.1336806 |
| 2 | 0.2673611 |
| 5 | 0.6684028 |
| 10 | 1.336806 |
| 25 | 3.342014 |
| 50 | 6.684028 |
| 100 | 13.36806 |
| 250 | 33.42014 |
| 500 | 66.84028 |
| 1000 | 133.6806 |
Liquid densities are quoted in kg/m³ or as specific gravity; gas densities are much smaller and pressure-dependent.
Density converts a volumetric flow to a mass flow and vice versa — the single most common bridge in a material balance.
Worked example. A density of 62.42796 lb/ft³ is 8.345404 lb/US gal.
Multiply the value in lb/ft³ by 0.1336806 to get lb/US gal. For example, 10 lb/ft³ = 1.336806 lb/US gal.
1 lb/ft³ equals 0.1336806 lb/US gal.
Liquid densities are quoted in kg/m³ or as specific gravity; gas densities are much smaller and pressure-dependent.