lb/ft³ to g/cm³ Converter
Convert pounds per cubic foot to grams per cubic centimeter — divide by 62.428. Results update as you type; exact factors shown.
One pound per cubic foot is 0.016 gram per cubic centimeter — see the exact factor, not a rounded rule of thumb.
How the lb/ft³ to g/cm³ converter works
Density converts through kg/m³. 1 g/cm³ = 1 kg/L = 1,000 kg/m³ (water at 4 °C). 1 lb/ft³ = 16.0185 kg/m³ and 1 lb/US gal = 119.83 kg/m³. Concrete is about 2,400 kg/m³, steel 7,850 kg/m³, petrol about 740 kg/m³.
The US uses customary units (US gallon, short ton, °F) in daily life; NIST SP 811 gives the exact SI factors.
Common density conversions
| From | To | Units |
|---|---|---|
| 10 lb/ft³ | 0.1602 g/cm³ | pound per cubic foot to gram per cubic centimeter |
| 30 lb/ft³ | 0.4806 g/cm³ | pound per cubic foot to gram per cubic centimeter |
| 50 lb/ft³ | 0.8009 g/cm³ | pound per cubic foot to gram per cubic centimeter |
| 62.428 lb/ft³ | 1 g/cm³ | pound per cubic foot to gram per cubic centimeter |
| 100 lb/ft³ | 1.6018 g/cm³ | pound per cubic foot to gram per cubic centimeter |
| 150 lb/ft³ | 2.4028 g/cm³ | pound per cubic foot to gram per cubic centimeter |
| 165 lb/ft³ | 2.643 g/cm³ | pound per cubic foot to gram per cubic centimeter |
| 200 lb/ft³ | 3.2037 g/cm³ | pound per cubic foot to gram per cubic centimeter |
| 300 lb/ft³ | 4.8055 g/cm³ | pound per cubic foot to gram per cubic centimeter |
| 490 lb/ft³ | 7.849 g/cm³ | pound per cubic foot to gram per cubic centimeter |
| 560 lb/ft³ | 8.9703 g/cm³ | pound per cubic foot to gram per cubic centimeter |
| 700 lb/ft³ | 11.2129 g/cm³ | pound per cubic foot to gram per cubic centimeter |
Units in this converter and their exact factors
| Unit | Symbol | One unit in kilogram per cubic meters |
|---|---|---|
| kilogram per cubic meter | kg/m³ | 1 kilogram per cubic meter |
| gram per cubic centimeter | g/cm³ | 1,000 kilogram per cubic meter |
| gram per milliliter | g/mL | 1,000 kilogram per cubic meter |
| kilogram per liter | kg/L | 1,000 kilogram per cubic meter |
| pound per cubic foot | lb/ft³ | 16.018463374 kilogram per cubic meter |
| pound per cubic inch | lb/in³ | 27,679.9047102 kilogram per cubic meter |
| pound per US gallon | lb/US gal | 119.826427317 kilogram per cubic meter |
| ounce per cubic inch | oz/in³ | 1,729.99404 kilogram per cubic meter |
| tonne per cubic meter | t/m³ | 1,000 kilogram per cubic meter |
FAQFrequently asked questions about density conversion
What is 62.428 lb/ft³?
Exactly 1 g/cm³ — the density of water.
What is 150 lb/ft³?
2.4 g/cm³, which is normal-weight concrete.
What is timber in g/cm³?
Softwood around 0.5, hardwood 0.7 to 1.1. Anything above 1 sinks.
Which unit do engineers use?
lb/ft³ in US construction, g/cm³ or kg/m³ almost everywhere else.
What is 490 lb/ft³?
Steel, at 7.85 g/cm³.
Where these figures come from
- BIPM — The International System of Units (SI Brochure, 9th edition) — definitions of the base and derived units.
- NIST Special Publication 811 — Guide for the Use of the International System of Units — the exact conversion factors used here.
- National Institute of Standards and Technology (NIST) — United States's national measurement authority.
Last checked: September 2026. Conversion factors are fixed by definition and do not change with tax years or regulations.