Mass per volume density.
Pounds per Cubic foot to Drams per Cubic foot Converter — lb/ft3 to dr/ft3
Convert Pound per Cubic foot (lb/ft3) to Dram per Cubic foot (dr/ft3) using the exact conversion factor (1 pound per cubic foot = 256 dram per cubic foot). See the formula, worked examples, conversion table, and common uses.
Pounds per Cubic foot to Drams 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 16.01846337 / 0.06257212255.
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 Drams per Cubic foot
Pound per Cubic foot and Dram 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 foot is most often used for us construction material density specs (concrete, soil, lumber, insulation).
Formula
drams per cubic foot = pounds per cubic foot × 256
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 dram per cubic foot equals 0.0625721225545 base units, so dividing one by the other gives the direct pound per cubic foot-to-dram per cubic foot factor of 256.
Simple example
1 lb/ft3 × 256 = 256 dr/ft3
1 pound per cubic foot = 256 drams per cubic foot.
Real-world example
1,000 lb/ft3 × 256 = 256,000 dr/ft3
1,000 pounds per cubic foot = 256,000 drams per cubic foot.
Conversion table
| Pound per Cubic foot (lb/ft3) | Dram per Cubic foot (dr/ft3) |
|---|---|
| 0.1 lb/ft3 | 25.6 dr/ft3 |
| 1 lb/ft3 | 256 dr/ft3 |
| 10 lb/ft3 | 2,560 dr/ft3 |
| 100 lb/ft3 | 25,600 dr/ft3 |
| 1,000 lb/ft3 | 256,000 dr/ft3 |
| 10,000 lb/ft3 | 2,560,000 dr/ft3 |
Reverse conversion: Dram per Cubic foot to Pound per Cubic foot
256 dr/ft3 × 0.00390625 = 1 lb/ft3
256 drams per cubic foot = 1 pound per cubic foot.
pounds per cubic foot = drams per cubic foot × 0.00390625
For a page dedicated to this direction, see Dram per Cubic foot 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 Dram per Cubic foot (dr/ft3)
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 drams per cubic foot are in 1 pound per cubic foot?
1 pound per cubic foot equals 256 drams per cubic foot, using the exact defined conversion factor rather than an estimate.
How do I convert pound per cubic foot to dram per cubic foot?
Multiply the pound per cubic foot value by 256. The converter above does this instantly to whatever precision you set.
How do I convert dram per cubic foot back to pound per cubic foot?
Use the reverse factor: 1 dram per cubic foot equals 0.00390625 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 dram per cubic foot?
Dram per Cubic foot (dr/ft3) is a unit of density.
Is the pound per cubic foot to dram per cubic foot conversion exact?
Yes. Both pound per cubic foot and dram per cubic foot are defined by fixed standards rather than physical artifacts, so the factor of 256 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.