Mass per volume density.
Pound per Cubic inches to Dram per Cubic inches Converter — lb/in3 to dr/in3
Convert Pound per Cubic inch (lb/in3) to Dram per Cubic inch (dr/in3) using the exact conversion factor (1 pound per cubic inch = 256 dram per cubic inch). See the formula, worked examples, conversion table, and common uses.
Pound per Cubic inches 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 27679.90471 / 108.1246278.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Pound per Cubic inches to Dram per Cubic inches
Pound per Cubic inch 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 inch is most often used for 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.
Formula
dram per cubic inches = pound per cubic inches × 256
This factor comes from each unit's defined relationship to the category's base unit: 1 pound per cubic inch equals 27679.9047102 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 inch-to-dram per cubic inch factor of 256.
Simple example
1 lb/in3 × 256 = 256 dr/in3
1 pound per cubic inch = 256 dram per cubic inches.
Real-world example
1,000 lb/in3 × 256 = 256,000 dr/in3
1,000 pound per cubic inches = 256,000 dram per cubic inches.
Conversion table
| Pound per Cubic inch (lb/in3) | Dram per Cubic inch (dr/in3) |
|---|---|
| 0.1 lb/in3 | 25.6 dr/in3 |
| 1 lb/in3 | 256 dr/in3 |
| 10 lb/in3 | 2,560 dr/in3 |
| 100 lb/in3 | 25,600 dr/in3 |
| 1,000 lb/in3 | 256,000 dr/in3 |
| 10,000 lb/in3 | 2,560,000 dr/in3 |
Reverse conversion: Dram per Cubic inch to Pound per Cubic inch
256 dr/in3 × 0.00390625 = 1 lb/in3
256 dram per cubic inches = 1 pound per cubic inch.
pound per cubic inches = dram per cubic inches × 0.00390625
For a page dedicated to this direction, see Dram per Cubic inch to Pound per Cubic inch.
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
Understanding the Dram per Cubic inch (dr/in3)
Mass per volume density.
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.
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 inch?
1 pound per cubic inch equals 256 dram per cubic inches, using the exact defined conversion factor rather than an estimate.
How do I convert pound per cubic inch to dram per cubic inch?
Multiply the pound per cubic inch value by 256. The converter above does this instantly to whatever precision you set.
How do I convert dram per cubic inch back to pound per cubic inch?
Use the reverse factor: 1 dram per cubic inch equals 0.00390625 pound per cubic inches. You can also use the swap control in the converter above to flip the direction instantly.
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.
What is a dram per cubic inch?
Dram per Cubic inch (dr/in3) is a unit of density.
Is the pound per cubic inch to dram per cubic inch conversion exact?
Yes. Both pound per cubic inch and dram per cubic inch 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 inch still used today?
United States
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.