Convert density units — kg/m³, g/cm³, lb/ft³, lb/in³ and more.
| Unit | Name | Value |
|---|---|---|
| kg/m³ | Kilogram/Cubic Meter | 27679.9 |
| g/cm³ | Gram/Cubic Centimeter | 27.6799 |
| kg/L | Kilogram/Liter | 27.6799 |
| lb/ft³ | Pound/Cubic Foot | 1727.9958 |
| oz/in³ | Ounce/Cubic Inch | 16.000035 |
| t/m³ | Tonne/Cubic Meter | 27.6799 |
Formula: lb/ft³ = lb/in³ × 1728
Multiply any lb/in³ value by 1728 to get lb/ft³.
Reverse: lb/in³ = lb/ft³ × 0.0005787
Common materials — factor: 1 lb/in³ = 1728 lb/ft³
| lb/in³ (lb/in³) | lb/ft³ (lb/ft³) | Material |
|---|---|---|
| 1.000e-05 lb/in³ | 0.01728 lb/ft³ | Gas |
| 0.0001 lb/in³ | 0.1728 lb/ft³ | Aerogel |
| 0.001 lb/in³ | 1.728 lb/ft³ | Light foam |
| 0.01 lb/in³ | 17.28 lb/ft³ | Wood |
| 0.0235 lb/in³ | 40.61 lb/ft³ | Polycarbonate |
| 0.0361 lb/in³ | 62.38 lb/ft³ | Water |
| 0.0368 lb/in³ | 63.59 lb/ft³ | Seawater |
| 0.058 lb/in³ | 100.2 lb/ft³ | Titanium light |
| 0.0975 lb/in³ | 168.5 lb/ft³ | Aluminum |
| 0.128 lb/in³ | 221.2 lb/ft³ | Titanium |
| 0.16 lb/in³ | 276.5 lb/ft³ | Titanium alloy |
| 0.284 lb/in³ | 490.8 lb/ft³ | Steel |
| 0.324 lb/in³ | 559.9 lb/ft³ | Copper |
| 0.409 lb/in³ | 706.8 lb/ft³ | Lead |
| 0.698 lb/in³ | 1206 lb/ft³ | Gold |
1 lb/in³ = 1728 lb/ft³.
Water = 1,000 kg/m³ = 1 g/cm³ = 1 kg/L = 62.4 lb/ft³ = 0.0361 lb/in³.
Multiply result by 0.0005787 to recover the original lb/in³ 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 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.
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.
Converting lb/in³ to lb/ft³ 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 = 0.03613 lb/in³ = 62.43 lb/ft³ — a universal anchor for density comparisons.
Exact factor: 1 lb/in³ = 1728 lb/ft³. Reverse: 1 lb/ft³ = 0.0005787 lb/in³.
All conversions use IEEE 754 double-precision arithmetic, accurate to at least 8 significant figures.