Convert density units — kg/m³, g/cm³, lb/ft³, lb/in³ and more.
| Unit | Name | Value |
|---|---|---|
| kg/m³ | Kilogram/Cubic Meter | 16.0185 |
| g/cm³ | Gram/Cubic Centimeter | 0.0160185 |
| kg/L | Kilogram/Liter | 0.0160185 |
| lb/in³ | Pound/Cubic Inch | 0.00057870513 |
| oz/in³ | Ounce/Cubic Inch | 0.0092593021 |
| t/m³ | Tonne/Cubic Meter | 0.0160185 |
Formula: kg/m³ = lb/ft³ × 16.02
Multiply any lb/ft³ value by 16.02 to get kg/m³.
Reverse: lb/ft³ = kg/m³ × 0.06243
Common materials — factor: 1 lb/ft³ = 16.02 kg/m³
| lb/ft³ (lb/ft³) | kg/m³ (kg/m³) | Material |
|---|---|---|
| 0.001 lb/ft³ | 0.01602 kg/m³ | Vacuum |
| 0.01 lb/ft³ | 0.1602 kg/m³ | Low pressure gas |
| 0.1 lb/ft³ | 1.602 kg/m³ | Very light foam |
| 0.0765 lb/ft³ | 1.225 kg/m³ | Air |
| 1 lb/ft³ | 16.02 kg/m³ | Light insulation |
| 10 lb/ft³ | 160.2 kg/m³ | Rigid foam |
| 43.7 lb/ft³ | 700 kg/m³ | Wood (oak) |
| 57.4 lb/ft³ | 919.5 kg/m³ | Concrete light |
| 62.4 lb/ft³ | 999.6 kg/m³ | Water |
| 64 lb/ft³ | 1025 kg/m³ | Seawater |
| 100 lb/ft³ | 1602 kg/m³ | Dense concrete |
| 167 lb/ft³ | 2675 kg/m³ | Aluminum |
| 490 lb/ft³ | 7849 kg/m³ | Steel |
| 708 lb/ft³ | 1.134e+04 kg/m³ | Lead |
| 1204 lb/ft³ | 1.929e+04 kg/m³ | Gold |
lb/ft³ × 16.018 = kg/m³. Round to × 16.
62.4 lb/ft³ = 1,000 kg/m³ (water). 490 lb/ft³ = 7,850 kg/m³ (steel).
kg/m³ × 0.06243 = lb/ft³.
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 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.
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/ft³ 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 = 62.43 lb/ft³ = 1000 kg/m³ — a universal anchor for density comparisons.
Exact factor: 1 lb/ft³ = 16.02 kg/m³. Reverse: 1 kg/m³ = 0.06243 lb/ft³.
All conversions use IEEE 754 double-precision arithmetic, accurate to at least 8 significant figures.