Convert density units — kg/m³, g/cm³, lb/ft³, lb/in³ and more.
| Unit | Name | Value |
|---|---|---|
| g/cm³ | Gram/Cubic Centimeter | 0.001 |
| kg/L | Kilogram/Liter | 0.001 |
| lb/ft³ | Pound/Cubic Foot | 0.062427818 |
| lb/in³ | Pound/Cubic Inch | 0.000036127298 |
| oz/in³ | Ounce/Cubic Inch | 0.00057803802 |
| t/m³ | Tonne/Cubic Meter | 0.001 |
Formula: lb/in³ = kg/m³ × 3.6127e-5
Multiply any kg/m³ value by 3.6127e-5 to get lb/in³.
Reverse: kg/m³ = lb/in³ × 2.768e+04
Common materials — factor: 1 kg/m³ = 3.6127e-5 lb/in³
| kg/m³ (kg/m³) | lb/in³ (lb/in³) | Material |
|---|---|---|
| 0.0001 kg/m³ | 3.613e-09 lb/in³ | Near vacuum |
| 0.001 kg/m³ | 3.613e-08 lb/in³ | Very low density gas |
| 0.1 kg/m³ | 3.613e-06 lb/in³ | Low pressure gas |
| 1 kg/m³ | 3.613e-05 lb/in³ | Hydrogen gas |
| 1.225 kg/m³ | 4.426e-05 lb/in³ | Air at sea level |
| 100 kg/m³ | 0.003613 lb/in³ | Light foam |
| 700 kg/m³ | 0.02529 lb/in³ | Wood |
| 917 kg/m³ | 0.03313 lb/in³ | Ice |
| 1000 kg/m³ | 0.03613 lb/in³ | Water |
| 1025 kg/m³ | 0.03703 lb/in³ | Seawater |
| 1600 kg/m³ | 0.0578 lb/in³ | Sand/gravel |
| 2700 kg/m³ | 0.09754 lb/in³ | Aluminum |
| 7850 kg/m³ | 0.2836 lb/in³ | Steel |
| 1.134e+04 kg/m³ | 0.4097 lb/in³ | Lead |
| 1.93e+04 kg/m³ | 0.6973 lb/in³ | Gold |
1 kg/m³ = 3.6127e-5 lb/in³.
Water = 1,000 kg/m³ = 1 g/cm³ = 1 kg/L = 62.4 lb/ft³ = 0.0361 lb/in³.
Multiply result by 2.768e+04 to recover the original kg/m³ 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.
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.
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 kg/m³ 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 = 1000 kg/m³ = 0.03613 lb/in³ — a universal anchor for density comparisons.
Exact factor: 1 kg/m³ = 3.6127e-5 lb/in³. Reverse: 1 lb/in³ = 2.768e+04 kg/m³.
All conversions use IEEE 754 double-precision arithmetic, accurate to at least 8 significant figures.