Mass per volume density.
Milligrams per Gallon to Carats per Cup Converter — mg/gal to ct/cup
Convert Milligram per Gallon (mg/gal) to Carat per Cup (ct/cup) using the exact conversion factor (1 milligram per gallon = 0.0003125 carat per cup). See the formula, worked examples, and conversion table.
Milligrams per Gallon to Carats 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 0.0002641720524 / 0.8453505675.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Milligrams per Gallon to Carats per Cup
Milligram per Gallon and Carat 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
carats per cup = milligrams per gallon × 0.0003125
This factor comes from each unit's defined relationship to the category's base unit: 1 milligram per gallon equals 0.000264172052358 base units, and 1 carat per cup equals 0.845350567546 base units, so dividing one by the other gives the direct milligram per gallon-to-carat per cup factor of 0.0003125.
Simple example
1 mg/gal × 0.0003125 = 0.0003125 ct/cup
1 milligram per gallon = 0.0003125 carats per cup.
Real-world example
1,000 mg/gal × 0.0003125 = 0.3125 ct/cup
1,000 milligrams per gallon = 0.3125 carats per cup.
Conversion table
| Milligram per Gallon (mg/gal) | Carat per Cup (ct/cup) |
|---|---|
| 0.1 mg/gal | 0.00003125 ct/cup |
| 1 mg/gal | 0.0003125 ct/cup |
| 10 mg/gal | 0.003125 ct/cup |
| 100 mg/gal | 0.03125 ct/cup |
| 1,000 mg/gal | 0.3125 ct/cup |
| 10,000 mg/gal | 3.125 ct/cup |
Reverse conversion: Carat per Cup to Milligram per Gallon
0.0003125 ct/cup × 3200 = 1 mg/gal
0.0003125 carats per cup = 1 milligrams per gallon.
milligrams per gallon = carats per cup × 3200
For a page dedicated to this direction, see Carat per Cup to Milligram per Gallon.
Understanding the Milligram per Gallon (mg/gal)
Mass per volume density.
Understanding the Carat per Cup (ct/cup)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many carats per cup are in 1 milligram per gallon?
1 milligram per gallon equals 0.0003125 carats per cup, using the exact defined conversion factor rather than an estimate.
How do I convert milligram per gallon to carat per cup?
Multiply the milligram per gallon value by 0.0003125. The converter above does this instantly to whatever precision you set.
How do I convert carat per cup back to milligram per gallon?
Use the reverse factor: 1 carat per cup equals 3,200 milligrams per gallon. You can also use the swap control in the converter above to flip the direction instantly.
What is a milligram per gallon?
Milligram per Gallon (mg/gal) is a unit of density.
What is a carat per cup?
Carat per Cup (ct/cup) is a unit of density.
Is the milligram per gallon to carat per cup conversion exact?
Yes. Both milligram per gallon and carat per cup are defined by fixed standards rather than physical artifacts, so the factor of 0.0003125 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.