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: g/cm³ = kg/m³ × 0.001
Multiply any kg/m³ value by 0.001 to get g/cm³.
Reverse: kg/m³ = g/cm³ × 1000
Common materials — factor: 1 kg/m³ = 0.001 g/cm³
| kg/m³ (kg/m³) | g/cm³ (g/cm³) | Material |
|---|---|---|
| 0.0001 kg/m³ | 1.000e-07 g/cm³ | Near vacuum |
| 0.001 kg/m³ | 1.000e-06 g/cm³ | Very low density gas |
| 0.1 kg/m³ | 0.0001 g/cm³ | Low pressure gas |
| 1 kg/m³ | 0.001 g/cm³ | Hydrogen gas |
| 1.225 kg/m³ | 0.001225 g/cm³ | Air at sea level |
| 100 kg/m³ | 0.1 g/cm³ | Light foam |
| 700 kg/m³ | 0.7 g/cm³ | Wood |
| 917 kg/m³ | 0.917 g/cm³ | Ice |
| 1000 kg/m³ | 1 g/cm³ | Water |
| 1025 kg/m³ | 1.025 g/cm³ | Seawater |
| 1600 kg/m³ | 1.6 g/cm³ | Sand/gravel |
| 2700 kg/m³ | 2.7 g/cm³ | Aluminum |
| 7850 kg/m³ | 7.85 g/cm³ | Steel |
| 1.134e+04 kg/m³ | 11.34 g/cm³ | Lead |
| 1.93e+04 kg/m³ | 19.3 g/cm³ | Gold |
kg/m³ ÷ 1,000 = g/cm³. Water: 1,000 kg/m³ = 1 g/cm³.
1,000 kg/m³ = 1 g/cm³ (water), 7,850 kg/m³ = 7.85 g/cm³ (steel).
g/cm³ × 1,000 = kg/m³.
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.
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.
Converting kg/m³ to g/cm³ 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 = 1 g/cm³ — a universal anchor for density comparisons.
Exact factor: 1 kg/m³ = 0.001 g/cm³. Reverse: 1 g/cm³ = 1000 kg/m³.
All conversions use IEEE 754 double-precision arithmetic, accurate to at least 8 significant figures.