How do I convert kg/m3 to lb/ft3?
Type a value in either box, and the answer shows it in the other unit as you type.
- Pounds per cubic foot (lb/ft³)
- 0.062428
1 kg/m³ = 0.062428 lb/ft³.
Pounds per cubic foot (lb/ft³): 0.062428. 1 kg/m³ = 0.062428 lb/ft³.
Pounds per cubic foot (lb/ft³) by kilograms per cubic meter (kg/m³)
How to calculate
Converts kilograms per cubic meter (kg/m³) to pounds per cubic foot (lb/ft³) and back, with the exact unit definitions.
Example with the default inputs (Kilograms per cubic meter (kg/m³) 1): 1 kg/m³ = 0.062428 lb/ft³.
Formula: lb/ft³ = kg/m³ × 0.0624279605761 (the same as kg/m³ ÷ 16.018463374)
- 1 kilogram per cubic meter = 0.0624279605761 pounds per cubic foot, from the exact definitions in NIST SP 811.
- Exact on the typed decimals: at most 6 decimal places (6 significant digits below 0.0001), rounded half up; an answer of 1 billion or more shows at most 15 significant digits.
Worked examples
Each example is checked against the calculator on every build.
- Kilograms per cubic meter (kg/m³) 1 gives Pounds per cubic foot (lb/ft³) 0.062428.Source: Exact unit definitions in NIST SP 811 (2008), Appendix B.8
- Kilograms per cubic meter (kg/m³) 1,000 gives Pounds per cubic foot (lb/ft³) 62.427961.Source: Exact unit definitions in NIST SP 811 (2008), Appendix B.8
- Pounds per cubic foot (lb/ft³) 1 gives Kilograms per cubic meter (kg/m³) 16.018463.Source: Exact unit definitions in NIST SP 811 (2008), Appendix B.8
Other questions people ask
How many pounds per cubic foot are in a kilogram per cubic meter?
1 kilogram per cubic meter is 0.062428 pounds per cubic foot, from the exact unit definitions (NIST SP 811).
How do I convert kg/m3 to lb/ft3?
Multiply by 0.062428: lb/ft³ = kg/m³ × 0.0624279605761 (the same as kg/m³ ÷ 16.018463374). For example, 1 kg/m³ × 0.062428 = 0.062428 lb/ft³.
How do I convert lb/ft3 back to kg/m3?
Multiply by 16.018463, or type the pounds per cubic foot into the second box and the converter works it out. 1 pound per cubic foot is 16.018463 kilograms per cubic meter.
Where does the factor come from?
1 lb/ft³ is 0.45359237 kg ÷ 0.028316846592 m³ (1 lb = 0.45359237 kg and 1 ft = 0.3048 m exactly, NIST SP 811), 16.018463 kg/m³. So lb/ft³ = kg/m³ ÷ 16.018463…, or × 0.062428.
What is the density of water in lb/ft³?
Pure water is 999.9749 kg/m³ at 4 °C, which is 62.426394 lb/ft³, and 998.2067 kg/m³ at 20 °C, 62.316009 lb/ft³ (Tanaka et al. 2001).