Mass per volume density.
Hectogram per Cubic inches to Pounds per Cubic foot Converter — hg/in3 to lb/ft3
Convert Hectogram per Cubic inch (hg/in3) to Pound per Cubic foot (lb/ft3) using the exact conversion factor (1 hectogram per cubic inch = 380.9587891 pound per cubic foot). See the formula, worked examples, conversion table, and common uses.
Hectogram per Cubic inches to Pounds per Cubic foot converter
Converter
Density Converter
Convert thousands of mass-per-volume density combinations for science, engineering, agriculture, and fluids.
Context values
Some unit families need one extra value for a physically accurate result.
Mass per volume density.
Result = input x 6102.374409 / 16.01846337.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Hectogram per Cubic inches to Pounds per Cubic foot
Hectogram per Cubic inch and Pound per Cubic foot both measure density — mass per unit volume — a property used to identify materials, check manufacturing quality, and predict whether something floats or sinks. As a fixed reference point, water has a density of exactly 1000 kg/m³ (1 g/cm³, 1 g/mL) at its temperature of maximum density, which is why many density figures in science and engineering are quoted relative to water. Both are mass per volume density units.
Formula
pounds per cubic foot = hectogram per cubic inches × 380.958789055
This factor comes from each unit's defined relationship to the category's base unit: 1 hectogram per cubic inch equals 6102.37440947 base units, and 1 pound per cubic foot equals 16.018463374 base units, so dividing one by the other gives the direct hectogram per cubic inch-to-pound per cubic foot factor of 380.958789055.
Simple example
1 hg/in3 × 380.9587891 = 380.9587891 lb/ft3
1 hectogram per cubic inch = 380.9587891 pounds per cubic foot.
Real-world example
1,000 hg/in3 × 380.9587891 = 380,958.7891 lb/ft3
1,000 hectogram per cubic inches = 380,958.7891 pounds per cubic foot.
Conversion table
| Hectogram per Cubic inch (hg/in3) | Pound per Cubic foot (lb/ft3) |
|---|---|
| 0.1 hg/in3 | 38.09587891 lb/ft3 |
| 1 hg/in3 | 380.9587891 lb/ft3 |
| 10 hg/in3 | 3,809.587891 lb/ft3 |
| 100 hg/in3 | 38,095.87891 lb/ft3 |
| 1,000 hg/in3 | 380,958.7891 lb/ft3 |
| 10,000 hg/in3 | 3,809,587.891 lb/ft3 |
Reverse conversion: Pound per Cubic foot to Hectogram per Cubic inch
380.9587891 lb/ft3 × 0.002624955845 = 1 hg/in3
380.9587891 pounds per cubic foot = 1 hectogram per cubic inches.
hectogram per cubic inches = pounds per cubic foot × 0.00262495584491
For a page dedicated to this direction, see Pound per Cubic foot to Hectogram per Cubic inch.
Understanding the Hectogram per Cubic inch (hg/in3)
Mass per volume density.
Understanding the Pound per Cubic foot
Pound per Cubic foot (lb/ft3) measures density. The US customary unit for expressing density, commonly used in construction and engineering material specifications. It is classified as a US customary density unit.
Where it's used: United States (construction, engineering, materials specifications)
Uses of the Pound per Cubic foot today
- US construction material density specs (concrete, soil, lumber, insulation)
- US engineering material property tables
- Bulk material handling and shipping weight estimates
Pound per Cubic foot — sources
- NIST Handbook 44 — General tables of units including US customary density measures.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many pounds per cubic foot are in 1 hectogram per cubic inch?
1 hectogram per cubic inch equals 380.9587891 pounds per cubic foot, using the exact defined conversion factor rather than an estimate.
How do I convert hectogram per cubic inch to pound per cubic foot?
Multiply the hectogram per cubic inch value by 380.9587891. The converter above does this instantly to whatever precision you set.
How do I convert pound per cubic foot back to hectogram per cubic inch?
Use the reverse factor: 1 pound per cubic foot equals 0.0026249558 hectogram per cubic inches. You can also use the swap control in the converter above to flip the direction instantly.
What is a hectogram per cubic inch?
Hectogram per Cubic inch (hg/in3) is a unit of density.
What is a pound per cubic foot?
Pound per Cubic foot (lb/ft3) measures density. The US customary unit for expressing density, commonly used in construction and engineering material specifications. It is classified as a US customary density unit.
Is the hectogram per cubic inch to pound per cubic foot conversion exact?
Yes. Both hectogram per cubic inch and pound per cubic foot are defined by fixed standards rather than physical artifacts, so the factor of 380.9587891 used above is exact to as many digits as you choose to display.
What's the difference between density and mass concentration?
Density is the mass of a pure substance or material per unit volume. Mass concentration is the mass of one component — like a dissolved solute — within a mixture's total volume. The two use the same kind of units but describe different physical situations.