Mass per volume density.
Carats per Cup to Dram per Cubic inches Converter — ct/cup to dr/in3
Convert Carat per Cup (ct/cup) to Dram per Cubic inch (dr/in3) using the exact conversion factor (1 carat per cup = 0.0078182981 dram per cubic inch). See the formula, worked examples, and conversion table.
Carats per Cup 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 0.8453505675 / 108.1246278.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Carats per Cup to Dram per Cubic inches
Carat per Cup 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. Both are mass per volume density units.
Formula
dram per cubic inches = carats per cup × 0.00781829805982
This factor comes from each unit's defined relationship to the category's base unit: 1 carat per cup equals 0.845350567546 base units, and 1 dram per cubic inch equals 108.124627774 base units, so dividing one by the other gives the direct carat per cup-to-dram per cubic inch factor of 0.00781829805982.
Simple example
1 ct/cup × 0.00781829806 = 0.0078182981 dr/in3
1 carat per cup = 0.0078182981 dram per cubic inches.
Real-world example
1,000 ct/cup × 0.00781829806 = 7.81829806 dr/in3
1,000 carats per cup = 7.81829806 dram per cubic inches.
Conversion table
| Carat per Cup (ct/cup) | Dram per Cubic inch (dr/in3) |
|---|---|
| 0.1 ct/cup | 0.0007818298 dr/in3 |
| 1 ct/cup | 0.0078182981 dr/in3 |
| 10 ct/cup | 0.0781829806 dr/in3 |
| 100 ct/cup | 0.781829806 dr/in3 |
| 1,000 ct/cup | 7.81829806 dr/in3 |
| 10,000 ct/cup | 78.1829806 dr/in3 |
Reverse conversion: Dram per Cubic inch to Carat per Cup
0.0078182981 dr/in3 × 127.905075 = 1.000000005 ct/cup
0.0078182981 dram per cubic inches = 1.000000005 carats per cup.
carats per cup = dram per cubic inches × 127.905075037
For a page dedicated to this direction, see Dram per Cubic inch to Carat per Cup.
Understanding the Carat per Cup (ct/cup)
Mass per volume density.
Understanding the Dram per Cubic inch (dr/in3)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many dram per cubic inches are in 1 carat per cup?
1 carat per cup equals 0.0078182981 dram per cubic inches, using the exact defined conversion factor rather than an estimate.
How do I convert carat per cup to dram per cubic inch?
Multiply the carat per cup value by 0.00781829806. The converter above does this instantly to whatever precision you set.
How do I convert dram per cubic inch back to carat per cup?
Use the reverse factor: 1 dram per cubic inch equals 127.905075 carats per cup. You can also use the swap control in the converter above to flip the direction instantly.
What is a carat per cup?
Carat per Cup (ct/cup) is a unit of density.
What is a dram per cubic inch?
Dram per Cubic inch (dr/in3) is a unit of density.
Is the carat per cup to dram per cubic inch conversion exact?
Yes. Both carat per cup and dram per cubic inch are defined by fixed standards rather than physical artifacts, so the factor of 0.00781829806 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.