Mass per volume density.
Pounds per Cubic foot to Grams per Imperial gallon Converter — lb/ft3 to g/imp gal
Convert Pound per Cubic foot (lb/ft3) to Gram per Imperial gallon (g/imp gal) using the exact conversion factor (1 pound per cubic foot = 72.82137616 gram per imperial gallon). See the formula, worked examples, conversion table, and common uses.
Pounds per Cubic foot to Grams per Imperial 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 16.01846337 / 0.2199692483.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Pounds per Cubic foot to Grams per Imperial gallon
Pound per Cubic foot and Gram per Imperial 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 Cubic foot is most often used for us construction material density specs (concrete, soil, lumber, insulation).
Formula
grams per imperial gallon = pounds per cubic foot × 72.8213761597
This factor comes from each unit's defined relationship to the category's base unit: 1 pound per cubic foot equals 16.018463374 base units, and 1 gram per imperial gallon equals 0.219969248299 base units, so dividing one by the other gives the direct pound per cubic foot-to-gram per imperial gallon factor of 72.8213761597.
Simple example
1 lb/ft3 × 72.82137616 = 72.82137616 g/imp gal
1 pound per cubic foot = 72.82137616 grams per imperial gallon.
Real-world example
1,000 lb/ft3 × 72.82137616 = 72,821.37616 g/imp gal
1,000 pounds per cubic foot = 72,821.37616 grams per imperial gallon.
Conversion table
| Pound per Cubic foot (lb/ft3) | Gram per Imperial gallon (g/imp gal) |
|---|---|
| 0.1 lb/ft3 | 7.282137616 g/imp gal |
| 1 lb/ft3 | 72.82137616 g/imp gal |
| 10 lb/ft3 | 728.2137616 g/imp gal |
| 100 lb/ft3 | 7,282.137616 g/imp gal |
| 1,000 lb/ft3 | 72,821.37616 g/imp gal |
| 10,000 lb/ft3 | 728,213.7616 g/imp gal |
Reverse conversion: Gram per Imperial gallon to Pound per Cubic foot
72.82137616 g/imp gal × 0.01373223156 = 1 lb/ft3
72.82137616 grams per imperial gallon = 1 pounds per cubic foot.
pounds per cubic foot = grams per imperial gallon × 0.0137322315608
For a page dedicated to this direction, see Gram per Imperial gallon to Pound per Cubic foot.
Understanding the Pound per Cubic foot
Pound per Cubic foot (lb/ft3) measures density. The US customary unit for expressing density, commonly used in construction and engineering material specifications. It is classified as a US customary density unit.
Where it's used: United States (construction, engineering, materials specifications)
Uses of the Pound per Cubic foot today
- US construction material density specs (concrete, soil, lumber, insulation)
- US engineering material property tables
- Bulk material handling and shipping weight estimates
Understanding the Gram per Imperial gallon (g/imp gal)
Mass per volume density.
Pound per Cubic foot — 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 grams per imperial gallon are in 1 pound per cubic foot?
1 pound per cubic foot equals 72.82137616 grams per imperial gallon, using the exact defined conversion factor rather than an estimate.
How do I convert pound per cubic foot to gram per imperial gallon?
Multiply the pound per cubic foot value by 72.82137616. The converter above does this instantly to whatever precision you set.
How do I convert gram per imperial gallon back to pound per cubic foot?
Use the reverse factor: 1 gram per imperial gallon equals 0.0137322316 pounds per cubic foot. You can also use the swap control in the converter above to flip the direction instantly.
What is a pound per cubic foot?
Pound per Cubic foot (lb/ft3) measures density. The US customary unit for expressing density, commonly used in construction and engineering material specifications. It is classified as a US customary density unit.
What is a gram per imperial gallon?
Gram per Imperial gallon (g/imp gal) is a unit of density.
Is the pound per cubic foot to gram per imperial gallon conversion exact?
Yes. Both pound per cubic foot and gram per imperial gallon are defined by fixed standards rather than physical artifacts, so the factor of 72.82137616 used above is exact to as many digits as you choose to display.
Where is the pound per cubic foot still used today?
United States (construction, engineering, materials specifications)
What's the difference between density and mass concentration?
Density is the mass of a pure substance or material per unit volume. Mass concentration is the mass of one component — like a dissolved solute — within a mixture's total volume. The two use the same kind of units but describe different physical situations.