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: tonne/m³ = lb/ft³ × 0.01602
Multiply any lb/ft³ value by 0.01602 to get tonne/m³.
Reverse: lb/ft³ = tonne/m³ × 62.43
Common materials — factor: 1 lb/ft³ = 0.01602 t/m³
| lb/ft³ (lb/ft³) | tonne/m³ (t/m³) | Material |
|---|---|---|
| 0.001 lb/ft³ | 1.602e-05 t/m³ | Vacuum |
| 0.01 lb/ft³ | 0.0001602 t/m³ | Low pressure gas |
| 0.1 lb/ft³ | 0.001602 t/m³ | Very light foam |
| 0.0765 lb/ft³ | 0.001225 t/m³ | Air |
| 1 lb/ft³ | 0.01602 t/m³ | Light insulation |
| 10 lb/ft³ | 0.1602 t/m³ | Rigid foam |
| 43.7 lb/ft³ | 0.7 t/m³ | Wood (oak) |
| 57.4 lb/ft³ | 0.9195 t/m³ | Concrete light |
| 62.4 lb/ft³ | 0.9996 t/m³ | Water |
| 64 lb/ft³ | 1.025 t/m³ | Seawater |
| 100 lb/ft³ | 1.602 t/m³ | Dense concrete |
| 167 lb/ft³ | 2.675 t/m³ | Aluminum |
| 490 lb/ft³ | 7.849 t/m³ | Steel |
| 708 lb/ft³ | 11.34 t/m³ | Lead |
| 1204 lb/ft³ | 19.29 t/m³ | Gold |
1 lb/ft³ = 0.01602 t/m³.
Water = 1,000 kg/m³ = 1 g/cm³ = 1 kg/L = 62.4 lb/ft³ = 0.0361 lb/in³.
Multiply result by 62.43 to recover the original lb/ft³ 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 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.
Tonnes per cubic meter (t/m³) equals 1,000 kg/m³ and is numerically identical to g/cm³ and kg/L. It is used in mining, geology, bulk materials handling, and geotechnical engineering where material quantities are measured in metric tonnes.
Mining and civil engineering use t/m³ extensively: crushed rock = 1.6 t/m³, sand = 1.5–1.7 t/m³, concrete = 2.3 t/m³, iron ore = 5.0 t/m³. Soil density (bulk density) is typically 1.2–1.8 t/m³ depending on compaction.
Interesting fact: The density of Earth's crust averages about 2.7 t/m³; the mantle 3.3–5.6 t/m³; the core 9.9–13 t/m³. The average density of the entire Earth is 5.515 t/m³ — about 5.5 times denser than water.
Converting lb/ft³ to tonne/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 = 1 tonne/m³ — a universal anchor for density comparisons.
Exact factor: 1 lb/ft³ = 0.01602 t/m³. Reverse: 1 t/m³ = 62.43 lb/ft³.
All conversions use IEEE 754 double-precision arithmetic, accurate to at least 8 significant figures.