Mass per volume density.
Grams per Gallon to Carats per Cup Converter — g/gal to ct/cup
Convert Gram per Gallon (g/gal) to Carat per Cup (ct/cup) using the exact conversion factor (1 gram per gallon = 0.3125 carat per cup). See the formula, worked examples, and conversion table.
Grams 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 0.2641720524 / 0.8453505675.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Grams per Gallon to Carats per Cup
Gram 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 = grams per gallon × 0.3125
This factor comes from each unit's defined relationship to the category's base unit: 1 gram per gallon equals 0.264172052358 base units, and 1 carat per cup equals 0.845350567546 base units, so dividing one by the other gives the direct gram per gallon-to-carat per cup factor of 0.3125.
Simple example
1 g/gal × 0.3125 = 0.3125 ct/cup
1 gram per gallon = 0.3125 carats per cup.
Real-world example
1,000 g/gal × 0.3125 = 312.5 ct/cup
1,000 grams per gallon = 312.5 carats per cup.
Conversion table
| Gram per Gallon (g/gal) | Carat per Cup (ct/cup) |
|---|---|
| 0.1 g/gal | 0.03125 ct/cup |
| 1 g/gal | 0.3125 ct/cup |
| 10 g/gal | 3.125 ct/cup |
| 100 g/gal | 31.25 ct/cup |
| 1,000 g/gal | 312.5 ct/cup |
| 10,000 g/gal | 3,125 ct/cup |
Reverse conversion: Carat per Cup to Gram per Gallon
0.3125 ct/cup × 3.2 = 1 g/gal
0.3125 carats per cup = 1 grams per gallon.
grams per gallon = carats per cup × 3.2
For a page dedicated to this direction, see Carat per Cup to Gram per Gallon.
Understanding the Gram per Gallon (g/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 gram per gallon?
1 gram per gallon equals 0.3125 carats per cup, using the exact defined conversion factor rather than an estimate.
How do I convert gram per gallon to carat per cup?
Multiply the gram per gallon value by 0.3125. The converter above does this instantly to whatever precision you set.
How do I convert carat per cup back to gram per gallon?
Use the reverse factor: 1 carat per cup equals 3.2 grams per gallon. You can also use the swap control in the converter above to flip the direction instantly.
What is a gram per gallon?
Gram per Gallon (g/gal) is a unit of density.
What is a carat per cup?
Carat per Cup (ct/cup) is a unit of density.
Is the gram per gallon to carat per cup conversion exact?
Yes. Both gram per gallon and carat per cup are defined by fixed standards rather than physical artifacts, so the factor of 0.3125 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.