Mass per volume density.
Pounds per Cup to Drams per Cup Converter — lb/cup to dr/cup
Convert Pound per Cup (lb/cup) to Dram per Cup (dr/cup) using the exact conversion factor (1 pound per cup = 256 dram per cup). See the formula, worked examples, and conversion table.
Pounds per Cup to Drams per Cup 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 1917.222837 / 7.489151707.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Pounds per Cup to Drams per Cup
Pound per Cup and Dram per Cup 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
drams per cup = pounds per cup × 256
This factor comes from each unit's defined relationship to the category's base unit: 1 pound per cup equals 1917.22283707 base units, and 1 dram per cup equals 7.48915170731 base units, so dividing one by the other gives the direct pound per cup-to-dram per cup factor of 256.
Simple example
1 lb/cup × 256 = 256 dr/cup
1 pound per cup = 256 drams per cup.
Real-world example
1,000 lb/cup × 256 = 256,000 dr/cup
1,000 pounds per cup = 256,000 drams per cup.
Conversion table
| Pound per Cup (lb/cup) | Dram per Cup (dr/cup) |
|---|---|
| 0.1 lb/cup | 25.6 dr/cup |
| 1 lb/cup | 256 dr/cup |
| 10 lb/cup | 2,560 dr/cup |
| 100 lb/cup | 25,600 dr/cup |
| 1,000 lb/cup | 256,000 dr/cup |
| 10,000 lb/cup | 2,560,000 dr/cup |
Reverse conversion: Dram per Cup to Pound per Cup
256 dr/cup × 0.00390625 = 1 lb/cup
256 drams per cup = 1 pound per cup.
pounds per cup = drams per cup × 0.00390625
For a page dedicated to this direction, see Dram per Cup to Pound per Cup.
Understanding the Pound per Cup (lb/cup)
Mass per volume density.
Understanding the Dram per Cup (dr/cup)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many drams per cup are in 1 pound per cup?
1 pound per cup equals 256 drams per cup, using the exact defined conversion factor rather than an estimate.
How do I convert pound per cup to dram per cup?
Multiply the pound per cup value by 256. The converter above does this instantly to whatever precision you set.
How do I convert dram per cup back to pound per cup?
Use the reverse factor: 1 dram per cup equals 0.00390625 pounds per cup. You can also use the swap control in the converter above to flip the direction instantly.
What is a pound per cup?
Pound per Cup (lb/cup) is a unit of density.
What is a dram per cup?
Dram per Cup (dr/cup) is a unit of density.
Is the pound per cup to dram per cup conversion exact?
Yes. Both pound per cup and dram per cup 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.
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.