How many pound per cubic inches are in 1 gram per cubic foot?

1 gram per cubic foot equals 0.0000012758 pound per cubic inches, using the exact defined conversion factor rather than an estimate.

How do I convert gram per cubic foot to pound per cubic inch?

Multiply the gram per cubic foot value by 0.000001275823277. The converter above does this instantly to whatever precision you set.

How do I convert pound per cubic inch back to gram per cubic foot?

Use the reverse factor: 1 pound per cubic inch equals 783,807.6154 grams per cubic foot. You can also use the swap control in the converter above to flip the direction instantly.

Is the gram per cubic foot to pound per cubic inch conversion exact?

Yes. Both gram per cubic foot and pound per cubic inch are defined by fixed standards rather than physical artifacts, so the factor of 0.000001275823277 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.

Grams per Cubic foot to Pound per Cubic inches Converter

Q: 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.

Q: 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.

About Converting Grams per Cubic foot to Pound per Cubic inches

Gram per Cubic foot and Pound per Cubic inch 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. Gram per Cubic foot is most often used for 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.

Formula

pound per cubic inches = grams per cubic foot × 0.00000127582327653

This factor comes from each unit's defined relationship to the category's base unit: 1 gram per cubic foot equals 0.0353146667215 base units, and 1 pound per cubic inch equals 27679.9047102 base units, so dividing one by the other gives the direct gram per cubic foot-to-pound per cubic inch factor of 0.00000127582327653.

Simple example

1 g/ft3 × 0.000001275823277 = 0.0000012758 lb/in3

1 gram per cubic foot = 0.0000012758 pound per cubic inches.

Real-world example

1,000 g/ft3 × 0.000001275823277 = 0.0012758233 lb/in3

1,000 grams per cubic foot = 0.0012758233 pound per cubic inches.

Conversion table

Gram per Cubic foot (g/ft3)	Pound per Cubic inch (lb/in3)
0.1 g/ft3	1.275823e-7 lb/in3
1 g/ft3	0.0000012758 lb/in3
10 g/ft3	0.0000127582 lb/in3
100 g/ft3	0.0001275823 lb/in3
1,000 g/ft3	0.0012758233 lb/in3
10,000 g/ft3	0.0127582328 lb/in3

Reverse conversion: Pound per Cubic inch to Gram per Cubic foot

0.0000012758 lb/in3 × 783807.6154 = 0.9999817557 g/ft3

0.0000012758 pound per cubic inches = 0.9999817557 grams per cubic foot.

grams per cubic foot = pound per cubic inches × 783807.61536

For a page dedicated to this direction, see Pound per Cubic inch to Gram per Cubic foot.

Gram per Cubic foot vs. Pound per Cubic inch

Aspect	Gram per Cubic foot	Pound per Cubic inch
Family	mixed metric/US customary density unit	US customary density unit
Typical use	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	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

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

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.

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.

Grams per Cubic foot to Pound per Cubic inches Converter — g/ft3 to lb/in3

Density Converter