Gram per cubic centimeter to Pound per cubic foot Conversion Table
| Gram per cubic centimeter (g/cm3) | Pound per cubic foot (lb/ft3) | Reference Benchmark | Formula Step |
|---|---|---|---|
| 0.001225 g/cm³ | 0.0765 lb/ft³ | Dry atmospheric air at standard temperature and pressure | 0.001225 × 62.428 = 0.0765 lb/ft³ |
| 0.12 g/cm³ | 7.491 lb/ft³ | Aviation balsa wood lightweight core material | 0.12 × 62.428 = 7.491 lb/ft³ |
| 0.24 g/cm³ | 14.983 lb/ft³ | Natural cork stopper insulation material | 0.24 × 62.428 = 14.983 lb/ft³ |
| 0.534 g/cm³ | 33.337 lb/ft³ | Elemental metallic lithium solid | 0.534 × 62.428 = 33.337 lb/ft³ |
| 0.68 g/cm³ | 42.451 lb/ft³ | Automotive gasoline motor fuel blend | 0.68 × 62.428 = 42.451 lb/ft³ |
| 0.8 g/cm³ | 49.942 lb/ft³ | Industrial denatured ethyl alcohol | 0.8 × 62.428 = 49.942 lb/ft³ |
| 0.917 g/cm³ | 57.246 lb/ft³ | Freshwater ice crystal density at 0°C | 0.917 × 62.428 = 57.246 lb/ft³ |
| 0.998 g/cm³ | 62.303 lb/ft³ | Liquid water density at ambient 20°C | 0.998 × 62.428 = 62.303 lb/ft³ |
| 1 g/cm³ | 62.428 lb/ft³ | Pure liquid water density baseline at 4°C | 1 × 62.428 = 62.428 lb/ft³ |
| 1.26 g/cm³ | 78.659 lb/ft³ | Pharmaceutical grade vegetable glycerin | 1.26 × 62.428 = 78.659 lb/ft³ |
| 2.4 g/cm³ | 149.827 lb/ft³ | Standard reinforced structural building concrete | 2.4 × 62.428 = 149.827 lb/ft³ |
| 2.7 g/cm³ | 168.556 lb/ft³ | Commercial aerospace aluminum alloy 6061 | 2.7 × 62.428 = 168.556 lb/ft³ |
| 7.85 g/cm³ | 490.06 lb/ft³ | Structural carbon construction steel | 7.85 × 62.428 = 490.06 lb/ft³ |
| 8.96 g/cm³ | 559.355 lb/ft³ | Pure electrical grade copper cathode | 8.96 × 62.428 = 559.355 lb/ft³ |
| 11.34 g/cm³ | 707.933 lb/ft³ | Refined elemental lead radiation shield | 11.34 × 62.428 = 707.933 lb/ft³ |
| 19.32 g/cm³ | 1,206.108 lb/ft³ | Refined 24-karat monetary bullion gold | 19.32 × 62.428 = 1,206.108 lb/ft³ |
Gram per cubic centimeter to Pound per cubic foot Formula & Unit Definitions
The exact ratio derives from imperial and metric unit definitions: 1 pound equals 453.59237 grams, while 1 cubic foot equals (12 × 2.54 cm)³ = 28,316.846592 cm³. Dividing volume by mass gives 28,316.846592 / 453.59237 ≈ 62.4279605 lb/ft³ per 1 g/cm³. Therefore, multiplying any density in g/cm³ by 62.4279605 yields its equivalent in lb/ft³.
Quick Estimation: For a rapid mental estimate, multiply the g/cm³ value by 62.4 (or multiply by 1,000 and divide by 16). For example, concrete at 2.4 g/cm³ corresponds to approximately 2.4 × 62.4 ≈ 150 lb/ft³.
Gram per cubic centimeter (g/cm3)
Source Unit- Primary metric CGS density unit used across geology, metallurgy, and pharmaceutical laboratories.
- Directly proportional to specific gravity at 4°C, where pure water equals 1.000 g/cm³.
- Compact scale where common solid engineering materials range from 0.5 to 20 g/cm³.
Pounds per Cubic Foot (lb/ft³)
Target Unit- Dominant engineering density unit in US building codes (IBC/ASCE), HVAC, and soil mechanics.
- Measures the gravitational weight force or mass contained within a 1 cubic foot envelope.
- Standard reference anchor where water is ~62.4 lb/ft³ and normal structural concrete is ~145-150 lb/ft³.
Frequently Asked Questions
Q.What is the exact formula for g/cm³ to lb/ft³?
Density (lb/ft³) = Density (g/cm³) × 62.4279605. For the reverse conversion from lb/ft³ to g/cm³, multiply by 0.01601846.
Q.What is the physical difference between Gram per cubic centimeter and Pound per cubic foot?
Gram per cubic centimeter is a metric CGS laboratory standard where water is 1.0 g/cm³, whereas Pound per cubic foot is an imperial engineering unit where water is ~62.4 lb/ft³.
Q.Why is water approximately 62.4 pounds per cubic foot?
Because 1 cubic foot holds approximately 7.48 US gallons or 28.32 liters of water. Since each liter of water weighs 1 kilogram (2.20462 pounds), 28.317 × 2.20462 ≈ 62.428 pounds.