Mass per volume density.
Ounces per Cup to Pounds per Cubic Millimeter Converter — oz/cup to lb/mm3
Convert Ounce per Cup (oz/cup) to Pound per Cubic Millimeter (lb/mm3) using the exact conversion factor (1 ounce per cup = 2.641721e-7 pound per cubic millimeter). See the formula, worked examples, and conversion table.
Ounces per Cup to Pounds per Cubic Millimeter 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 119.8264273 / 4.5359237e+8.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Ounces per Cup to Pounds per Cubic Millimeter
Ounce per Cup and Pound per Cubic Millimeter 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
pounds per cubic millimeter = ounces per cup × 2.641721e-7
This factor comes from each unit's defined relationship to the category's base unit: 1 ounce per cup equals 119.826427317 base units, and 1 pound per cubic millimeter equals 453592370 base units, so dividing one by the other gives the direct ounce per cup-to-pound per cubic millimeter factor of 2.641721e-7.
Simple example
1 oz/cup × 2.641721e-7 = 2.641721e-7 lb/mm3
1 ounce per cup = 2.641721e-7 pounds per cubic millimeter.
Real-world example
1,000 oz/cup × 2.641721e-7 = 0.0002641721 lb/mm3
1,000 ounces per cup = 0.0002641721 pounds per cubic millimeter.
Conversion table
| Ounce per Cup (oz/cup) | Pound per Cubic Millimeter (lb/mm3) |
|---|---|
| 0.1 oz/cup | 2.641721e-8 lb/mm3 |
| 1 oz/cup | 2.641721e-7 lb/mm3 |
| 10 oz/cup | 0.0000026417 lb/mm3 |
| 100 oz/cup | 0.0000264172 lb/mm3 |
| 1,000 oz/cup | 0.0002641721 lb/mm3 |
| 10,000 oz/cup | 0.0026417205 lb/mm3 |
Reverse conversion: Pound per Cubic Millimeter to Ounce per Cup
2.641721e-7 lb/mm3 × 3785411.784 = 1.00000018 oz/cup
2.641721e-7 pounds per cubic millimeter = 1.00000018 ounces per cup.
ounces per cup = pounds per cubic millimeter × 3785411.784
For a page dedicated to this direction, see Pound per Cubic Millimeter to Ounce per Cup.
Understanding the Ounce per Cup (oz/cup)
Mass per volume density.
Understanding the Pound per Cubic Millimeter (lb/mm3)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many pounds per cubic millimeter are in 1 ounce per cup?
1 ounce per cup equals 2.641721e-7 pounds per cubic millimeter, using the exact defined conversion factor rather than an estimate.
How do I convert ounce per cup to pound per cubic millimeter?
Multiply the ounce per cup value by 2.641721e-7. The converter above does this instantly to whatever precision you set.
How do I convert pound per cubic millimeter back to ounce per cup?
Use the reverse factor: 1 pound per cubic millimeter equals 3,785,411.784 ounces per cup. You can also use the swap control in the converter above to flip the direction instantly.
What is a ounce per cup?
Ounce per Cup (oz/cup) is a unit of density.
What is a pound per cubic millimeter?
Pound per Cubic Millimeter (lb/mm3) is a unit of density.
Is the ounce per cup to pound per cubic millimeter conversion exact?
Yes. Both ounce per cup and pound per cubic millimeter are defined by fixed standards rather than physical artifacts, so the factor of 2.641721e-7 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.