Convert density units — kg/m³, g/cm³, lb/ft³, lb/in³ and more.
| Unit | Name | Value |
|---|---|---|
| kg/m³ | Kilogram/Cubic Meter | 1000 |
| kg/L | Kilogram/Liter | 1 |
| lb/ft³ | Pound/Cubic Foot | 62.427818 |
| lb/in³ | Pound/Cubic Inch | 0.036127298 |
| oz/in³ | Ounce/Cubic Inch | 0.57803802 |
| t/m³ | Tonne/Cubic Meter | 1 |
Formula: lb/in³ = g/cm³ × 0.03613
Multiply any g/cm³ value by 0.03613 to get lb/in³.
Reverse: g/cm³ = lb/in³ × 27.68
Common materials — factor: 1 g/cm³ = 0.03613 lb/in³
| g/cm³ (g/cm³) | lb/in³ (lb/in³) | Material |
|---|---|---|
| 0.0001 g/cm³ | 3.613e-06 lb/in³ | Gas trace |
| 0.001 g/cm³ | 3.613e-05 lb/in³ | Low pressure gas |
| 0.01 g/cm³ | 0.0003613 lb/in³ | Light foam |
| 0.1 g/cm³ | 0.003613 lb/in³ | Aerogel |
| 0.917 g/cm³ | 0.03313 lb/in³ | Ice |
| 1 g/cm³ | 0.03613 lb/in³ | Water |
| 1.025 g/cm³ | 0.03703 lb/in³ | Seawater |
| 1.6 g/cm³ | 0.0578 lb/in³ | Sand bulk |
| 2.7 g/cm³ | 0.09754 lb/in³ | Aluminum |
| 3.52 g/cm³ | 0.1272 lb/in³ | Diamond |
| 7.85 g/cm³ | 0.2836 lb/in³ | Steel |
| 8.96 g/cm³ | 0.3237 lb/in³ | Copper |
| 11.34 g/cm³ | 0.4097 lb/in³ | Lead |
| 19.3 g/cm³ | 0.6973 lb/in³ | Gold |
| 22.59 g/cm³ | 0.8161 lb/in³ | Osmium |
g/cm³ × 0.03613 = lb/in³. Round to × 0.0361.
1 g/cm³ = 0.0361 lb/in³. 7.85 g/cm³ = 0.284 lb/in³ (steel).
lb/in³ × 27.68 = g/cm³.
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.
Grams per cubic centimeter (g/cm³) equals exactly 1,000 kg/m³ and is numerically identical to g/mL and kg/L. It became popular in chemistry and materials science because water has a convenient density of exactly 1 g/cm³ at 4°C.
Specific gravity (relative density) is defined relative to water at 1 g/cm³, making g/cm³ intuitive for chemists. Gemstone density is expressed in g/cm³: diamond = 3.52 g/cm³, sapphire = 4.0 g/cm³. Metals: iron = 7.87 g/cm³, copper = 8.96 g/cm³.
Interesting fact: The human body has an average density of about 0.985 g/cm³ — just below water — which is why most people float. Fat has a density of ~0.9 g/cm³ while muscle is ~1.06 g/cm³.
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 g/cm³ 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 = 1 g/cm³ = 0.03613 lb/in³ — a universal anchor for density comparisons.
Exact factor: 1 g/cm³ = 0.03613 lb/in³. Reverse: 1 lb/in³ = 27.68 g/cm³.
All conversions use IEEE 754 double-precision arithmetic, accurate to at least 8 significant figures.