Pound per Cubic Foot to Kilogram per Cubic Meter Converter
Converts pound per cubic foot to kilogram per cubic meter (lb/ft³ to kg/m³) and back. The conversion factor is shown below every result.
How to Convert Pound per Cubic Foot to Kilogram per Cubic Meter
What Is a Pound per Cubic Foot?
Pound per cubic foot (lb/ft³) is a US customary unit of density.
What Is a Kilogram per Cubic Meter?
The SI unit of density is kilogram per cubic meter (kg/m³).
Common Pound per Cubic Foot to Kilogram per Cubic Meter Reference Points
Real-world reference values for quick sanity checks.
| Item | Pound per Cubic Foot (lb/ft³) | Kilogram per Cubic Meter (approx.) |
|---|---|---|
| Water's density (approx.) | 62.4 lb/ft³ | 999.55 kg/m³ |
| Pine wood's density (approx.) | 30 lb/ft³ | 480.55 kg/m³ |
| Reference values are illustrative approximations for common items, not measured specifications. | ||
Pound per Cubic Foot to Kilogram per Cubic Meter Conversion Table
| Pound per Cubic Foot (lb/ft³) | Kilogram per Cubic Meter (kg/m³) |
|---|---|
| 10 lb/ft³ | 160.184634 kg/m³ |
| 30 lb/ft³ | 480.553901 kg/m³ |
| 50 lb/ft³ | 800.923169 kg/m³ |
| 62.4 lb/ft³ | 999.552115 kg/m³ |
| 100 lb/ft³ | 1601.846337 kg/m³ |
| 150 lb/ft³ | 2402.769506 kg/m³ |
| Source: NIST SP 811 (1 lb/ft³ = 16.018463373960138 kg/m³ exactly) | |
Frequently Asked Questions
How do I convert lb/ft³ to kg/m³?
Multiply the lb/ft³ value by 16.0184633740. For example, 45 lb/ft³ × 16.0184633740 = 720.831 kg/m³.
Is this an exact conversion?
Yes. It derives entirely from two exact defined constants (1 lb = 0.45359237 kg and 1 ft = 0.3048 m), so there's no independent rounding in the factor.
Where is lb/ft³ commonly used?
US engineering and construction contexts often specify material densities (concrete, soil, insulation, wood) in lb/ft³, while international specifications use kg/m³.
Related Density Converters
A good measuring tool marked in both lb/ft³ and kg/m³ removes the guesswork at the point of use.