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/ft³ = g/cm³ × 62.43
Multiply any g/cm³ value by 62.43 to get lb/ft³.
Reverse: g/cm³ = lb/ft³ × 0.01602
Common materials — factor: 1 g/cm³ = 62.43 lb/ft³
| g/cm³ (g/cm³) | lb/ft³ (lb/ft³) | Material |
|---|---|---|
| 0.0001 g/cm³ | 0.006243 lb/ft³ | Gas trace |
| 0.001 g/cm³ | 0.06243 lb/ft³ | Low pressure gas |
| 0.01 g/cm³ | 0.6243 lb/ft³ | Light foam |
| 0.1 g/cm³ | 6.243 lb/ft³ | Aerogel |
| 0.917 g/cm³ | 57.25 lb/ft³ | Ice |
| 1 g/cm³ | 62.43 lb/ft³ | Water |
| 1.025 g/cm³ | 63.99 lb/ft³ | Seawater |
| 1.6 g/cm³ | 99.88 lb/ft³ | Sand bulk |
| 2.7 g/cm³ | 168.6 lb/ft³ | Aluminum |
| 3.52 g/cm³ | 219.7 lb/ft³ | Diamond |
| 7.85 g/cm³ | 490.1 lb/ft³ | Steel |
| 8.96 g/cm³ | 559.4 lb/ft³ | Copper |
| 11.34 g/cm³ | 707.9 lb/ft³ | Lead |
| 19.3 g/cm³ | 1205 lb/ft³ | Gold |
| 22.59 g/cm³ | 1410 lb/ft³ | Osmium |
g/cm³ × 62.43 = lb/ft³.
1 g/cm³ = 62.43 lb/ft³ (water anchor). 7.85 g/cm³ = 490 lb/ft³.
lb/ft³ ÷ 62.43 = 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 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.
Converting g/cm³ to lb/ft³ 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 = 62.43 lb/ft³ — a universal anchor for density comparisons.
Exact factor: 1 g/cm³ = 62.43 lb/ft³. Reverse: 1 lb/ft³ = 0.01602 g/cm³.
All conversions use IEEE 754 double-precision arithmetic, accurate to at least 8 significant figures.