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: kg/m³ = lb/in³ × 2.768e+04
Multiply any lb/in³ value by 2.768e+04 to get kg/m³.
Reverse: lb/in³ = kg/m³ × 3.6127e-5
Common materials — factor: 1 lb/in³ = 2.768e+04 kg/m³
| lb/in³ (lb/in³) | kg/m³ (kg/m³) | Material |
|---|---|---|
| 1.000e-05 lb/in³ | 0.2768 kg/m³ | Gas |
| 0.0001 lb/in³ | 2.768 kg/m³ | Aerogel |
| 0.001 lb/in³ | 27.68 kg/m³ | Light foam |
| 0.01 lb/in³ | 276.8 kg/m³ | Wood |
| 0.0235 lb/in³ | 650.5 kg/m³ | Polycarbonate |
| 0.0361 lb/in³ | 999.2 kg/m³ | Water |
| 0.0368 lb/in³ | 1019 kg/m³ | Seawater |
| 0.058 lb/in³ | 1605 kg/m³ | Titanium light |
| 0.0975 lb/in³ | 2699 kg/m³ | Aluminum |
| 0.128 lb/in³ | 3543 kg/m³ | Titanium |
| 0.16 lb/in³ | 4429 kg/m³ | Titanium alloy |
| 0.284 lb/in³ | 7861 kg/m³ | Steel |
| 0.324 lb/in³ | 8968 kg/m³ | Copper |
| 0.409 lb/in³ | 1.132e+04 kg/m³ | Lead |
| 0.698 lb/in³ | 1.932e+04 kg/m³ | Gold |
1 lb/in³ = 2.768e+04 kg/m³.
Water = 1,000 kg/m³ = 1 g/cm³ = 1 kg/L = 62.4 lb/ft³ = 0.0361 lb/in³.
Multiply result by 3.6127e-5 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.
Kilograms per cubic meter (kg/m³) is the SI unit of density, defined as the mass in kilograms contained in one cubic meter of a substance. It became the international standard with the adoption of the SI system in 1960.
Most physical and engineering tables express density in kg/m³: water = 1,000 kg/m³, air = 1.225 kg/m³, steel = 7,850 kg/m³, gold = 19,300 kg/m³. The kg/m³ is the base unit for Archimedes' buoyancy calculations and fluid dynamics.
Interesting fact: The density of the Sun's core is about 150,000 kg/m³ — 150 times denser than water. Osmium, the densest naturally occurring element, has a density of 22,590 kg/m³, nearly twice that of lead.
Converting lb/in³ to kg/m³ 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 = 1000 kg/m³ — a universal anchor for density comparisons.
Exact factor: 1 lb/in³ = 2.768e+04 kg/m³. Reverse: 1 kg/m³ = 3.6127e-5 lb/in³.
All conversions use IEEE 754 double-precision arithmetic, accurate to at least 8 significant figures.