Mass per volume density.
Pounds per Cubic foot to Kilograms per Gallon Converter — lb/ft3 to kg/gal
Convert Pound per Cubic foot (lb/ft3) to Kilogram per Gallon (kg/gal) using the exact conversion factor (1 pound per cubic foot = 0.06063648 kilogram per gallon). See the formula, worked examples, conversion table, unit comparison, and common uses.
Pounds per Cubic foot to Kilograms 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 16.01846337 / 264.1720524.
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 Gallon
Pound per Cubic foot and Kilogram 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. Pound per Cubic foot is most often used for us construction material density specs (concrete, soil, lumber, insulation).
Formula
kilograms per gallon = pounds per cubic foot × 0.0606364800174
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 gallon equals 264.172052358 base units, so dividing one by the other gives the direct pound per cubic foot-to-kilogram per gallon factor of 0.0606364800174.
Simple example
1 lb/ft3 × 0.06063648002 = 0.06063648 kg/gal
1 pound per cubic foot = 0.06063648 kilograms per gallon.
Real-world example
1,000 lb/ft3 × 0.06063648002 = 60.63648002 kg/gal
1,000 pounds per cubic foot = 60.63648002 kilograms per gallon.
Conversion table
| Pound per Cubic foot (lb/ft3) | Kilogram per Gallon (kg/gal) |
|---|---|
| 0.1 lb/ft3 | 0.006063648 kg/gal |
| 1 lb/ft3 | 0.06063648 kg/gal |
| 10 lb/ft3 | 0.6063648002 kg/gal |
| 100 lb/ft3 | 6.063648002 kg/gal |
| 1,000 lb/ft3 | 60.63648002 kg/gal |
| 10,000 lb/ft3 | 606.3648002 kg/gal |
Reverse conversion: Kilogram per Gallon to Pound per Cubic foot
0.06063648 kg/gal × 16.49172247 = 0.9999999997 lb/ft3
0.06063648 kilograms per gallon = 0.9999999997 pounds per cubic foot.
pounds per cubic foot = kilograms per gallon × 16.4917224699
For a page dedicated to this direction, see Kilogram per Gallon to Pound per Cubic foot.
Pound per Cubic foot vs. Kilogram per Gallon
| Aspect | Pound per Cubic foot | Kilogram per Gallon |
|---|---|---|
| Family | US customary density unit | mixed metric/US customary density unit |
| Typical use | US construction material density specs (concrete, soil, lumber, insulation) | Can be used to express liquid density such as fuel or industrial liquids in kilograms per gallon — in practice, kilograms per liter (metric) and pounds per gallon (US customary) are the specific pairings more commonly seen in fuel and liquid-density references |
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 Gallon
Kilogram per Gallon (kg/gal) measures density. A mathematically valid way to express liquid density in kilograms per US gallon. It is classified as a mixed metric/US customary density unit.
Uses of the Kilogram per Gallon today
- Can be used to express liquid density such as fuel or industrial liquids in kilograms per gallon — in practice, kilograms per liter (metric) and pounds per gallon (US customary) are the specific pairings more commonly seen in fuel and liquid-density references
Pound per Cubic foot — sources
- NIST Handbook 44 — General tables of units including US customary density measures.
Kilogram per Gallon — sources
- Fuel and petroleum liquid-density references — Liquid density figures for fuels are typically reported in kg/L, kg/m³, or lb/gal rather than kg/gal.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many kilograms per gallon are in 1 pound per cubic foot?
1 pound per cubic foot equals 0.06063648 kilograms per gallon, using the exact defined conversion factor rather than an estimate.
How do I convert pound per cubic foot to kilogram per gallon?
Multiply the pound per cubic foot value by 0.06063648002. The converter above does this instantly to whatever precision you set.
How do I convert kilogram per gallon back to pound per cubic foot?
Use the reverse factor: 1 kilogram per gallon equals 16.49172247 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 gallon?
Kilogram per Gallon (kg/gal) measures density. A mathematically valid way to express liquid density in kilograms per US gallon. It is classified as a mixed metric/US customary density unit.
Is the pound per cubic foot to kilogram per gallon conversion exact?
Yes. Both pound per cubic foot and kilogram per gallon are defined by fixed standards rather than physical artifacts, so the factor of 0.06063648002 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.