Mass per volume density.
Grains per Gallon to Pounds per Cubic foot Converter — gr/gal to lb/ft3
Convert Grain per Gallon (gr/gal) to Pound per Cubic foot (lb/ft3) using the exact conversion factor (1 grain per gallon = 0.0010686456 pound per cubic foot). See the formula, worked examples, conversion table, and common uses.
Grains per Gallon 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 0.01711806105 / 16.01846337.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Grains per Gallon to Pounds per Cubic foot
Grain per Gallon 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 = grains per gallon × 0.00106864564007
This factor comes from each unit's defined relationship to the category's base unit: 1 grain per gallon equals 0.0171180610453 base units, and 1 pound per cubic foot equals 16.018463374 base units, so dividing one by the other gives the direct grain per gallon-to-pound per cubic foot factor of 0.00106864564007.
Simple example
1 gr/gal × 0.00106864564 = 0.0010686456 lb/ft3
1 grain per gallon = 0.0010686456 pounds per cubic foot.
Real-world example
1,000 gr/gal × 0.00106864564 = 1.06864564 lb/ft3
1,000 grains per gallon = 1.06864564 pounds per cubic foot.
Conversion table
| Grain per Gallon (gr/gal) | Pound per Cubic foot (lb/ft3) |
|---|---|
| 0.1 gr/gal | 0.0001068646 lb/ft3 |
| 1 gr/gal | 0.0010686456 lb/ft3 |
| 10 gr/gal | 0.0106864564 lb/ft3 |
| 100 gr/gal | 0.106864564 lb/ft3 |
| 1,000 gr/gal | 1.06864564 lb/ft3 |
| 10,000 gr/gal | 10.6864564 lb/ft3 |
Reverse conversion: Pound per Cubic foot to Grain per Gallon
0.0010686456 lb/ft3 × 935.7638889 = 0.9999999625 gr/gal
0.0010686456 pounds per cubic foot = 0.9999999625 grains per gallon.
grains per gallon = pounds per cubic foot × 935.763888889
For a page dedicated to this direction, see Pound per Cubic foot to Grain per Gallon.
Understanding the Grain per Gallon (gr/gal)
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 grain per gallon?
1 grain per gallon equals 0.0010686456 pounds per cubic foot, using the exact defined conversion factor rather than an estimate.
How do I convert grain per gallon to pound per cubic foot?
Multiply the grain per gallon value by 0.00106864564. The converter above does this instantly to whatever precision you set.
How do I convert pound per cubic foot back to grain per gallon?
Use the reverse factor: 1 pound per cubic foot equals 935.7638889 grains per gallon. You can also use the swap control in the converter above to flip the direction instantly.
What is a grain per gallon?
Grain per Gallon (gr/gal) 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 grain per gallon to pound per cubic foot conversion exact?
Yes. Both grain per gallon and pound per cubic foot are defined by fixed standards rather than physical artifacts, so the factor of 0.00106864564 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.