Pound per Cubic Foot (lb/ft³)
The pound per cubic foot (lb/ft³, pcf) is the US customary density unit, about 16.02 kg/m³. Water is about 62.4 lb/ft³.
Symbol: lb/ft³ (ASCII: lb/ft3)
Quantity: density (mass per unit volume) and mass concentration
SI relation: 1 lb/ft³ = 16.01846337396 kg/m³ (exact)
Derivation: 1 lb/ft³ = 0.45359237 kg ÷ 0.028316846592 m³ = 16.018463374 kg/m³
Exact: yes, by definition
Typical uses
- Concrete, soil and aggregate densities (normal concrete ≈ 145–150 pcf)
- Insulation and foam densities
- Standard air density 0.075 lb/ft³
Convert pounds per cubic foot to other units
| Conversion | 1 lb/ft³ equals | Reverse |
|---|---|---|
| pound per cubic foot to kilogram per cubic meter | 16.01846337 kg/m³ | kilogram per cubic meter to pound per cubic foot |
| pound per cubic foot to gram per cubic centimeter | 0.01601846337 g/cm³ | gram per cubic centimeter to pound per cubic foot |
| pound per cubic foot to milligram per liter | 16018.46337 mg/L | milligram per liter to pound per cubic foot |
| pound per cubic foot to pound per gallon | 0.1336805556 lb/gal | pound per gallon to pound per cubic foot |
| pound per cubic foot to kilogram per liter | 0.01601846337 kg/L | kilogram per liter to pound per cubic foot |
| pound per cubic foot to gram per liter | 16.01846337 g/L | gram per liter to pound per cubic foot |
| pound per cubic foot to pound per cubic inch | 0.0005787037037 lb/in³ | pound per cubic inch to pound per cubic foot |
Open the Density Converter to convert any value between all units.
Sources
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "pound per cubic foot (lb/ft³)".
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Pound per Cubic Foot (lb/ft³). Retrieved October 17, 2026, from https://scientificconverters.com/units/pound-per-cubic-foot/
IEEE
Scientific Converters, "Pound per Cubic Foot (lb/ft³)," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/units/pound-per-cubic-foot/