Mass per volume density.
Pounds per Cubic foot to Grains per Liter Converter — lb/ft3 to gr/L
Convert Pound per Cubic foot (lb/ft3) to Grain per Liter (gr/L) using the exact conversion factor (1 pound per cubic foot = 247.2026671 grain per liter). See the formula, worked examples, conversion table, and common uses.
Pounds per Cubic foot to Grains per Liter 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 16.01846337 / 0.06479891.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Pounds per Cubic foot to Grains per Liter
Pound per Cubic foot and Grain per Liter 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 foot is most often used for us construction material density specs (concrete, soil, lumber, insulation).
Formula
grains per liter = pounds per cubic foot × 247.20266705
This factor comes from each unit's defined relationship to the category's base unit: 1 pound per cubic foot equals 16.018463374 base units, and 1 grain per liter equals 0.06479891 base units, so dividing one by the other gives the direct pound per cubic foot-to-grain per liter factor of 247.20266705.
Simple example
1 lb/ft3 × 247.2026671 = 247.2026671 gr/L
1 pound per cubic foot = 247.2026671 grains per liter.
Real-world example
1,000 lb/ft3 × 247.2026671 = 247,202.6671 gr/L
1,000 pounds per cubic foot = 247,202.6671 grains per liter.
Conversion table
| Pound per Cubic foot (lb/ft3) | Grain per Liter (gr/L) |
|---|---|
| 0.1 lb/ft3 | 24.72026671 gr/L |
| 1 lb/ft3 | 247.2026671 gr/L |
| 10 lb/ft3 | 2,472.026671 gr/L |
| 100 lb/ft3 | 24,720.26671 gr/L |
| 1,000 lb/ft3 | 247,202.6671 gr/L |
| 10,000 lb/ft3 | 2,472,026.671 gr/L |
Reverse conversion: Grain per Liter to Pound per Cubic foot
247.2026671 gr/L × 0.004045263799 = 1 lb/ft3
247.2026671 grains per liter = 1 pounds per cubic foot.
pounds per cubic foot = grains per liter × 0.00404526379886
For a page dedicated to this direction, see Grain per Liter to Pound per Cubic foot.
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
Understanding the Grain per Liter (gr/L)
Mass per volume density.
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 grains per liter are in 1 pound per cubic foot?
1 pound per cubic foot equals 247.2026671 grains per liter, using the exact defined conversion factor rather than an estimate.
How do I convert pound per cubic foot to grain per liter?
Multiply the pound per cubic foot value by 247.2026671. The converter above does this instantly to whatever precision you set.
How do I convert grain per liter back to pound per cubic foot?
Use the reverse factor: 1 grain per liter equals 0.0040452638 pounds per cubic foot. You can also use the swap control in the converter above to flip the direction instantly.
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.
What is a grain per liter?
Grain per Liter (gr/L) is a unit of density.
Is the pound per cubic foot to grain per liter conversion exact?
Yes. Both pound per cubic foot and grain per liter are defined by fixed standards rather than physical artifacts, so the factor of 247.2026671 used above is exact to as many digits as you choose to display.
Where is the pound per cubic foot still used today?
United States (construction, engineering, materials specifications)
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.