Mass per volume density.
Pounds per Cubic foot to Kilograms per Cubic yard Converter — lb/ft3 to kg/yd3
Convert Pound per Cubic foot (lb/ft3) to Kilogram per Cubic yard (kg/yd3) using the exact conversion factor (1 pound per cubic foot = 12.24699399 kilogram per cubic yard). See the formula, worked examples, conversion table, unit comparison, and common uses.
Pounds per Cubic foot to Kilograms per Cubic yard 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 / 1.307950619.
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 Cubic yard
Pound per Cubic foot and Kilogram per Cubic yard 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 cubic yard = pounds per cubic foot × 12.24699399
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 cubic yard equals 1.30795061931 base units, so dividing one by the other gives the direct pound per cubic foot-to-kilogram per cubic yard factor of 12.24699399.
Simple example
1 lb/ft3 × 12.24699399 = 12.24699399 kg/yd3
1 pound per cubic foot = 12.24699399 kilograms per cubic yard.
Real-world example
1,000 lb/ft3 × 12.24699399 = 12,246.99399 kg/yd3
1,000 pounds per cubic foot = 12,246.99399 kilograms per cubic yard.
Conversion table
| Pound per Cubic foot (lb/ft3) | Kilogram per Cubic yard (kg/yd3) |
|---|---|
| 0.1 lb/ft3 | 1.224699399 kg/yd3 |
| 1 lb/ft3 | 12.24699399 kg/yd3 |
| 10 lb/ft3 | 122.4699399 kg/yd3 |
| 100 lb/ft3 | 1,224.699399 kg/yd3 |
| 1,000 lb/ft3 | 12,246.99399 kg/yd3 |
| 10,000 lb/ft3 | 122,469.9399 kg/yd3 |
Reverse conversion: Kilogram per Cubic yard to Pound per Cubic foot
12.24699399 kg/yd3 × 0.0816526897 = 1 lb/ft3
12.24699399 kilograms per cubic yard = 1 pounds per cubic foot.
pounds per cubic foot = kilograms per cubic yard × 0.0816526896981
For a page dedicated to this direction, see Kilogram per Cubic yard to Pound per Cubic foot.
Pound per Cubic foot vs. Kilogram per Cubic yard
| Aspect | Pound per Cubic foot | Kilogram per Cubic yard |
|---|---|---|
| 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 the density of bulk construction materials such as gravel, soil, or aggregate — in practice, US construction and landscaping references more commonly express this as tons per cubic yard or pounds 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 Kilogram per Cubic yard
Kilogram per Cubic yard (kg/yd3) measures density. A mathematically valid way to express bulk material density in kilograms per cubic yard. It is classified as a mixed metric/US customary density unit.
Uses of the Kilogram per Cubic yard today
- Can be used to express the density of bulk construction materials such as gravel, soil, or aggregate — in practice, US construction and landscaping references more commonly express this as tons per cubic yard or pounds per cubic foot
Pound per Cubic foot — sources
- NIST Handbook 44 — General tables of units including US customary density measures.
Kilogram per Cubic yard — sources
- US construction and landscaping material-estimating references — Bulk material weight by volume is typically reported in tons per cubic yard in US construction and landscaping contexts.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many kilograms per cubic yard are in 1 pound per cubic foot?
1 pound per cubic foot equals 12.24699399 kilograms per cubic yard, using the exact defined conversion factor rather than an estimate.
How do I convert pound per cubic foot to kilogram per cubic yard?
Multiply the pound per cubic foot value by 12.24699399. The converter above does this instantly to whatever precision you set.
How do I convert kilogram per cubic yard back to pound per cubic foot?
Use the reverse factor: 1 kilogram per cubic yard equals 0.0816526897 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 cubic yard?
Kilogram per Cubic yard (kg/yd3) measures density. A mathematically valid way to express bulk material density in kilograms per cubic yard. It is classified as a mixed metric/US customary density unit.
Is the pound per cubic foot to kilogram per cubic yard conversion exact?
Yes. Both pound per cubic foot and kilogram per cubic yard are defined by fixed standards rather than physical artifacts, so the factor of 12.24699399 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.