Mass per volume density.
Pounds per Cubic foot to Dram per Cubic inches Converter — lb/ft3 to dr/in3
Convert Pound per Cubic foot (lb/ft3) to Dram per Cubic inch (dr/in3) using the exact conversion factor (1 pound per cubic foot = 0.1481481481 dram per cubic inch). See the formula, worked examples, conversion table, and common uses.
Pounds per Cubic foot to Dram per Cubic inches 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 / 108.1246278.
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 Dram per Cubic inches
Pound per Cubic foot and Dram 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. Pound per Cubic foot is most often used for us construction material density specs (concrete, soil, lumber, insulation).
Formula
dram per cubic inches = pounds per cubic foot × 0.148148148148
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 inch equals 108.124627774 base units, so dividing one by the other gives the direct pound per cubic foot-to-dram per cubic inch factor of 0.148148148148.
Simple example
1 lb/ft3 × 0.1481481481 = 0.1481481481 dr/in3
1 pound per cubic foot = 0.1481481481 dram per cubic inches.
Real-world example
1,000 lb/ft3 × 0.1481481481 = 148.1481481 dr/in3
1,000 pounds per cubic foot = 148.1481481 dram per cubic inches.
Conversion table
| Pound per Cubic foot (lb/ft3) | Dram per Cubic inch (dr/in3) |
|---|---|
| 0.1 lb/ft3 | 0.0148148148 dr/in3 |
| 1 lb/ft3 | 0.1481481481 dr/in3 |
| 10 lb/ft3 | 1.481481481 dr/in3 |
| 100 lb/ft3 | 14.81481481 dr/in3 |
| 1,000 lb/ft3 | 148.1481481 dr/in3 |
| 10,000 lb/ft3 | 1,481.481481 dr/in3 |
Reverse conversion: Dram per Cubic inch to Pound per Cubic foot
0.1481481481 dr/in3 × 6.75 = 0.9999999997 lb/ft3
0.1481481481 dram per cubic inches = 0.9999999997 pounds per cubic foot.
pounds per cubic foot = dram per cubic inches × 6.75
For a page dedicated to this direction, see Dram per Cubic inch 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 inch (dr/in3)
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 dram per cubic inches are in 1 pound per cubic foot?
1 pound per cubic foot equals 0.1481481481 dram per cubic inches, using the exact defined conversion factor rather than an estimate.
How do I convert pound per cubic foot to dram per cubic inch?
Multiply the pound per cubic foot value by 0.1481481481. The converter above does this instantly to whatever precision you set.
How do I convert dram per cubic inch back to pound per cubic foot?
Use the reverse factor: 1 dram per cubic inch equals 6.75 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 inch?
Dram per Cubic inch (dr/in3) is a unit of density.
Is the pound per cubic foot to dram per cubic inch conversion exact?
Yes. Both pound per cubic foot and dram per cubic inch are defined by fixed standards rather than physical artifacts, so the factor of 0.1481481481 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.