Mass per volume density.
Ounce per Cubic inches to Drams per Cup Converter — oz/in3 to dr/cup
Convert Ounce per Cubic inch (oz/in3) to Dram per Cup (dr/cup) using the exact conversion factor (1 ounce per cubic inch = 231 dram per cup). See the formula, worked examples, and conversion table.
Ounce per Cubic inches 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 1729.994044 / 7.489151707.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Ounce per Cubic inches to Drams per Cup
Ounce per Cubic inch 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 = ounce per cubic inches × 231
This factor comes from each unit's defined relationship to the category's base unit: 1 ounce per cubic inch equals 1729.99404439 base units, and 1 dram per cup equals 7.48915170731 base units, so dividing one by the other gives the direct ounce per cubic inch-to-dram per cup factor of 231.
Simple example
1 oz/in3 × 231 = 231 dr/cup
1 ounce per cubic inch = 231 drams per cup.
Real-world example
1,000 oz/in3 × 231 = 231,000 dr/cup
1,000 ounce per cubic inches = 231,000 drams per cup.
Conversion table
| Ounce per Cubic inch (oz/in3) | Dram per Cup (dr/cup) |
|---|---|
| 0.1 oz/in3 | 23.1 dr/cup |
| 1 oz/in3 | 231 dr/cup |
| 10 oz/in3 | 2,310 dr/cup |
| 100 oz/in3 | 23,100 dr/cup |
| 1,000 oz/in3 | 231,000 dr/cup |
| 10,000 oz/in3 | 2,310,000 dr/cup |
Reverse conversion: Dram per Cup to Ounce per Cubic inch
231 dr/cup × 0.004329004329 = 1 oz/in3
231 drams per cup = 1 ounce per cubic inches.
ounce per cubic inches = drams per cup × 0.004329004329
For a page dedicated to this direction, see Dram per Cup to Ounce per Cubic inch.
Understanding the Ounce per Cubic inch (oz/in3)
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 ounce per cubic inch?
1 ounce per cubic inch equals 231 drams per cup, using the exact defined conversion factor rather than an estimate.
How do I convert ounce per cubic inch to dram per cup?
Multiply the ounce per cubic inch value by 231. The converter above does this instantly to whatever precision you set.
How do I convert dram per cup back to ounce per cubic inch?
Use the reverse factor: 1 dram per cup equals 0.0043290043 ounce per cubic inches. You can also use the swap control in the converter above to flip the direction instantly.
What is a ounce per cubic inch?
Ounce per Cubic inch (oz/in3) is a unit of density.
What is a dram per cup?
Dram per Cup (dr/cup) is a unit of density.
Is the ounce per cubic inch to dram per cup conversion exact?
Yes. Both ounce per cubic inch and dram per cup are defined by fixed standards rather than physical artifacts, so the factor of 231 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.