Convert density units — kg/m³, g/cm³, lb/ft³, lb/in³ and more.
| Unit | Name | Value |
|---|---|---|
| kg/m³ | Kilogram/Cubic Meter | 16.0185 |
| g/cm³ | Gram/Cubic Centimeter | 0.0160185 |
| kg/L | Kilogram/Liter | 0.0160185 |
| lb/in³ | Pound/Cubic Inch | 0.00057870513 |
| oz/in³ | Ounce/Cubic Inch | 0.0092593021 |
| t/m³ | Tonne/Cubic Meter | 0.0160185 |
Formula: lb/in³ = lb/ft³ × 0.0005787
Multiply any lb/ft³ value by 0.0005787 to get lb/in³.
Reverse: lb/ft³ = lb/in³ × 1728
Common materials — factor: 1 lb/ft³ = 0.0005787 lb/in³
| lb/ft³ (lb/ft³) | lb/in³ (lb/in³) | Material |
|---|---|---|
| 0.001 lb/ft³ | 5.787e-07 lb/in³ | Vacuum |
| 0.01 lb/ft³ | 5.787e-06 lb/in³ | Low pressure gas |
| 0.1 lb/ft³ | 5.787e-05 lb/in³ | Very light foam |
| 0.0765 lb/ft³ | 4.427e-05 lb/in³ | Air |
| 1 lb/ft³ | 0.0005787 lb/in³ | Light insulation |
| 10 lb/ft³ | 0.005787 lb/in³ | Rigid foam |
| 43.7 lb/ft³ | 0.02529 lb/in³ | Wood (oak) |
| 57.4 lb/ft³ | 0.03322 lb/in³ | Concrete light |
| 62.4 lb/ft³ | 0.03611 lb/in³ | Water |
| 64 lb/ft³ | 0.03704 lb/in³ | Seawater |
| 100 lb/ft³ | 0.05787 lb/in³ | Dense concrete |
| 167 lb/ft³ | 0.09664 lb/in³ | Aluminum |
| 490 lb/ft³ | 0.2836 lb/in³ | Steel |
| 708 lb/ft³ | 0.4097 lb/in³ | Lead |
| 1204 lb/ft³ | 0.6968 lb/in³ | Gold |
1 lb/ft³ = 0.0005787 lb/in³.
Water = 1,000 kg/m³ = 1 g/cm³ = 1 kg/L = 62.4 lb/ft³ = 0.0361 lb/in³.
Multiply result by 1728 to recover the original lb/ft³ value.
Compares material densities to optimize weight-to-strength ratios in product design.
Calculates dead loads from material densities for structural design in kg/m³ and lb/ft³.
Selects lightweight materials (aluminum, titanium, composites) based on density in g/cm³ or lb/in³.
Measures crude oil and drilling fluid density in kg/m³ or lb/ft³ for reservoir engineering.
Measures soil and rock bulk density in t/m³ for foundation and slope stability analysis.
Uses density in g/cm³ for solution concentration, specific gravity, and process design calculations.
Pounds per cubic foot (lb/ft³) is the standard density unit in US engineering and construction. One lb/ft³ equals approximately 16.018 kg/m³. It is used for structural materials, soil, insulation, and HVAC calculations in American practice.
Common lb/ft³ values: air = 0.0765 lb/ft³, water = 62.4 lb/ft³, concrete = 145–150 lb/ft³, structural steel = 490 lb/ft³, wood varies 20–50 lb/ft³. ASHRAE tables for HVAC use lb/ft³ for air and refrigerant densities.
Interesting fact: Aerogel, the world's least dense solid material, has a density of about 0.1–1 lb/ft³ (1.6–16 kg/m³). It is primarily composed of air and can support thousands of times its own weight.
Pounds per cubic inch (lb/in³) is used in aerospace, precision machining, and materials engineering where compact unit sizes are practical. One lb/in³ equals 27,679.9 kg/m³.
lb/in³ is standard in US aerospace for specifying material density in structural weight calculations: aluminum = 0.098 lb/in³, titanium = 0.160 lb/in³, steel = 0.284 lb/in³. The unit is preferred because aircraft structural calculations often work in inch-pound units.
Interesting fact: The density of uranium is 0.69 lb/in³ (19,100 kg/m³), making it about 2.4 times denser than steel. This high density — combined with its nuclear properties — makes it valuable for radiation shielding and as kinetic energy penetrators.
Converting lb/ft³ to lb/in³ is common in materials science, engineering, and manufacturing. SI units (kg/m³, g/cm³) are standard in scientific and metric engineering contexts, while Imperial units (lb/ft³, lb/in³) are used in US construction and aerospace. Water at 4°C = 62.43 lb/ft³ = 0.03613 lb/in³ — a universal anchor for density comparisons.
Exact factor: 1 lb/ft³ = 0.0005787 lb/in³. Reverse: 1 lb/in³ = 1728 lb/ft³.
All conversions use IEEE 754 double-precision arithmetic, accurate to at least 8 significant figures.