Mass per volume density.
Pounds per Cubic foot to Kilograms per Imperial gallon Converter — lb/ft3 to kg/imp gal
Convert Pound per Cubic foot (lb/ft3) to Kilogram per Imperial gallon (kg/imp gal) using the exact conversion factor (1 pound per cubic foot = 0.0728213762 kilogram per imperial gallon). See the formula, worked examples, conversion table, unit comparison, and common uses.
Pounds per Cubic foot to Kilograms 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 / 219.9692483.
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 Kilograms per Imperial gallon
Pound per Cubic foot and Kilogram 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
kilograms per imperial gallon = pounds per cubic foot × 0.0728213761597
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 kilogram per imperial gallon equals 219.969248299 base units, so dividing one by the other gives the direct pound per cubic foot-to-kilogram per imperial gallon factor of 0.0728213761597.
Simple example
1 lb/ft3 × 0.07282137616 = 0.0728213762 kg/imp gal
1 pound per cubic foot = 0.0728213762 kilograms per imperial gallon.
Real-world example
1,000 lb/ft3 × 0.07282137616 = 72.82137616 kg/imp gal
1,000 pounds per cubic foot = 72.82137616 kilograms per imperial gallon.
Conversion table
| Pound per Cubic foot (lb/ft3) | Kilogram per Imperial gallon (kg/imp gal) |
|---|---|
| 0.1 lb/ft3 | 0.0072821376 kg/imp gal |
| 1 lb/ft3 | 0.0728213762 kg/imp gal |
| 10 lb/ft3 | 0.7282137616 kg/imp gal |
| 100 lb/ft3 | 7.282137616 kg/imp gal |
| 1,000 lb/ft3 | 72.82137616 kg/imp gal |
| 10,000 lb/ft3 | 728.2137616 kg/imp gal |
Reverse conversion: Kilogram per Imperial gallon to Pound per Cubic foot
0.0728213762 kg/imp gal × 13.73223156 = 1.000000001 lb/ft3
0.0728213762 kilograms per imperial gallon = 1.000000001 pounds per cubic foot.
pounds per cubic foot = kilograms per imperial gallon × 13.7322315608
For a page dedicated to this direction, see Kilogram per Imperial gallon to Pound per Cubic foot.
Pound per Cubic foot vs. Kilogram per Imperial gallon
| Aspect | Pound per Cubic foot | Kilogram per Imperial gallon |
|---|---|---|
| Family | US customary density unit | mixed metric/UK customary density unit |
| Typical use | US construction material density specs (concrete, soil, lumber, insulation) | Can be used to express liquid density in UK/Commonwealth contexts that reference the imperial gallon — in practice, kilograms per liter is the more commonly seen metric density unit even in these regions |
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 Kilogram per Imperial gallon
Kilogram per Imperial gallon (kg/imp gal) measures density. A mathematically valid way to express liquid density in kilograms per imperial gallon. It is classified as a mixed metric/UK customary density unit.
Uses of the Kilogram per Imperial gallon today
- Can be used to express liquid density in UK/Commonwealth contexts that reference the imperial gallon — in practice, kilograms per liter is the more commonly seen metric density unit even in these regions
Pound per Cubic foot — sources
- NIST Handbook 44 — General tables of units including US customary density measures.
Kilogram per Imperial gallon — sources
- UK/Commonwealth liquid-measurement references — The imperial gallon remains in some UK/Commonwealth commercial use, but liquid density is more commonly quoted in kilograms per liter.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many kilograms per imperial gallon are in 1 pound per cubic foot?
1 pound per cubic foot equals 0.0728213762 kilograms per imperial gallon, using the exact defined conversion factor rather than an estimate.
How do I convert pound per cubic foot to kilogram per imperial gallon?
Multiply the pound per cubic foot value by 0.07282137616. The converter above does this instantly to whatever precision you set.
How do I convert kilogram per imperial gallon back to pound per cubic foot?
Use the reverse factor: 1 kilogram per imperial gallon equals 13.73223156 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 kilogram per imperial gallon?
Kilogram per Imperial gallon (kg/imp gal) measures density. A mathematically valid way to express liquid density in kilograms per imperial gallon. It is classified as a mixed metric/UK customary density unit.
Is the pound per cubic foot to kilogram per imperial gallon conversion exact?
Yes. Both pound per cubic foot and kilogram per imperial gallon are defined by fixed standards rather than physical artifacts, so the factor of 0.07282137616 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.