Mass per volume density.
Ounces per Cup to Drams per Gallon Converter — oz/cup to dr/gal
Convert Ounce per Cup (oz/cup) to Dram per Gallon (dr/gal) using the exact conversion factor (1 ounce per cup = 256 dram per gallon). See the formula, worked examples, and conversion table.
Ounces per Cup to Drams per Gallon 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 / 0.4680719817.
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 Drams per Gallon
Ounce per Cup and Dram per Gallon 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 gallon = ounces per cup × 256
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 dram per gallon equals 0.468071981707 base units, so dividing one by the other gives the direct ounce per cup-to-dram per gallon factor of 256.
Simple example
1 oz/cup × 256 = 256 dr/gal
1 ounce per cup = 256 drams per gallon.
Real-world example
1,000 oz/cup × 256 = 256,000 dr/gal
1,000 ounces per cup = 256,000 drams per gallon.
Conversion table
| Ounce per Cup (oz/cup) | Dram per Gallon (dr/gal) |
|---|---|
| 0.1 oz/cup | 25.6 dr/gal |
| 1 oz/cup | 256 dr/gal |
| 10 oz/cup | 2,560 dr/gal |
| 100 oz/cup | 25,600 dr/gal |
| 1,000 oz/cup | 256,000 dr/gal |
| 10,000 oz/cup | 2,560,000 dr/gal |
Reverse conversion: Dram per Gallon to Ounce per Cup
256 dr/gal × 0.00390625 = 1 oz/cup
256 drams per gallon = 1 ounce per cup.
ounces per cup = drams per gallon × 0.00390625
For a page dedicated to this direction, see Dram per Gallon to Ounce per Cup.
Understanding the Ounce per Cup (oz/cup)
Mass per volume density.
Understanding the Dram per Gallon (dr/gal)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many drams per gallon are in 1 ounce per cup?
1 ounce per cup equals 256 drams per gallon, using the exact defined conversion factor rather than an estimate.
How do I convert ounce per cup to dram per gallon?
Multiply the ounce per cup value by 256. The converter above does this instantly to whatever precision you set.
How do I convert dram per gallon back to ounce per cup?
Use the reverse factor: 1 dram per gallon equals 0.00390625 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 dram per gallon?
Dram per Gallon (dr/gal) is a unit of density.
Is the ounce per cup to dram per gallon conversion exact?
Yes. Both ounce per cup and dram per gallon 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.