Mass per volume density.
Pound per Cubic inches to Grams per Cubic foot Converter — lb/in3 to g/ft3
Convert Pound per Cubic inch (lb/in3) to Gram per Cubic foot (g/ft3) using the exact conversion factor (1 pound per cubic inch = 783,807.6154 gram per cubic foot). See the formula, worked examples, conversion table, unit comparison, and common uses.
Pound per Cubic inches to Grams 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 27679.90471 / 0.03531466672.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Pound per Cubic inches to Grams per Cubic foot
Pound per Cubic inch and Gram 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. Pound per Cubic inch is most often used for used in machining and materials engineering, particularly for describing the density of metals, where a smaller volume unit than the cubic foot gives a more convenient figure.
Formula
grams per cubic foot = pound per cubic inches × 783807.61536
This factor comes from each unit's defined relationship to the category's base unit: 1 pound per cubic inch equals 27679.9047102 base units, and 1 gram per cubic foot equals 0.0353146667215 base units, so dividing one by the other gives the direct pound per cubic inch-to-gram per cubic foot factor of 783807.61536.
Simple example
1 lb/in3 × 783807.6154 = 783,807.6154 g/ft3
1 pound per cubic inch = 783,807.6154 grams per cubic foot.
Real-world example
1,000 lb/in3 × 783807.6154 = 783,807,615.4 g/ft3
1,000 pound per cubic inches = 783,807,615.4 grams per cubic foot.
Conversion table
| Pound per Cubic inch (lb/in3) | Gram per Cubic foot (g/ft3) |
|---|---|
| 0.1 lb/in3 | 78,380.76154 g/ft3 |
| 1 lb/in3 | 783,807.6154 g/ft3 |
| 10 lb/in3 | 7,838,076.154 g/ft3 |
| 100 lb/in3 | 78,380,761.54 g/ft3 |
| 1,000 lb/in3 | 783,807,615.4 g/ft3 |
| 10,000 lb/in3 | 7,838,076,154 g/ft3 |
Reverse conversion: Gram per Cubic foot to Pound per Cubic inch
1 g/ft3 × 0.000001275823277 = 0.0000012758 lb/in3
1 gram per cubic foot = 0.0000012758 pound per cubic inches.
pound per cubic inches = grams per cubic foot × 0.00000127582327653
For a page dedicated to this direction, see Gram per Cubic foot to Pound per Cubic inch.
Pound per Cubic inch vs. Gram per Cubic foot
| Aspect | Pound per Cubic inch | Gram per Cubic foot |
|---|---|---|
| Family | US customary density unit | mixed metric/US customary density unit |
| Typical use | Used in machining and materials engineering, particularly for describing the density of metals, where a smaller volume unit than the cubic foot gives a more convenient figure | Can be used to express the density of low-density materials such as insulation foam, packaging material, or gas concentration by volume — for typical solid or liquid materials, kilograms per cubic meter or pounds per cubic foot are more commonly encountered |
Understanding the Pound per Cubic inch
Pound per Cubic inch (lb/in3) measures density. A US customary density unit suited to describing dense materials in a small volume. It is classified as a US customary density unit.
Where it's used: United States
Uses of the Pound per Cubic inch today
- Used in machining and materials engineering, particularly for describing the density of metals, where a smaller volume unit than the cubic foot gives a more convenient figure
Understanding the Gram per Cubic foot
Gram per Cubic foot (g/ft3) measures density. A gram is a small mass unit and a cubic foot a comparatively large volume, so this combination naturally suits low-density materials rather than typical solids or liquids. It is classified as a mixed metric/US customary density unit.
Uses of the Gram per Cubic foot today
- Can be used to express the density of low-density materials such as insulation foam, packaging material, or gas concentration by volume — for typical solid or liquid materials, kilograms per cubic meter or pounds per cubic foot are more commonly encountered
Pound per Cubic inch — sources
- US materials-engineering reference tables — Pounds per cubic inch is a commonly tabulated density unit for metals in US machining and materials references.
Gram per Cubic foot — sources
- BIPM SI Brochure — Gram and cubic foot as units combinable to express density, though not a standard industry pairing for general materials.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many grams per cubic foot are in 1 pound per cubic inch?
1 pound per cubic inch equals 783,807.6154 grams per cubic foot, using the exact defined conversion factor rather than an estimate.
How do I convert pound per cubic inch to gram per cubic foot?
Multiply the pound per cubic inch value by 783807.6154. The converter above does this instantly to whatever precision you set.
How do I convert gram per cubic foot back to pound per cubic inch?
Use the reverse factor: 1 gram per cubic foot equals 0.0000012758 pound per cubic inches. You can also use the swap control in the converter above to flip the direction instantly.
What is a pound per cubic inch?
Pound per Cubic inch (lb/in3) measures density. A US customary density unit suited to describing dense materials in a small volume. It is classified as a US customary density unit.
What is a gram per cubic foot?
Gram per Cubic foot (g/ft3) measures density. A gram is a small mass unit and a cubic foot a comparatively large volume, so this combination naturally suits low-density materials rather than typical solids or liquids. It is classified as a mixed metric/US customary density unit.
Is the pound per cubic inch to gram per cubic foot conversion exact?
Yes. Both pound per cubic inch and gram per cubic foot are defined by fixed standards rather than physical artifacts, so the factor of 783807.6154 used above is exact to as many digits as you choose to display.
Where is the pound per cubic inch still used today?
United States
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.