Mass per volume density.
Grams per Cup to Grams per Gallon Converter — g/cup to g/gal
Convert Gram per Cup (g/cup) to Gram per Gallon (g/gal) using the exact conversion factor (1 gram per cup = 16 gram per gallon). See the formula, worked examples, and conversion table.
Grams per Cup to Grams 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 4.226752838 / 0.2641720524.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Grams per Cup to Grams per Gallon
Gram per Cup and Gram 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
grams per gallon = grams per cup × 16
This factor comes from each unit's defined relationship to the category's base unit: 1 gram per cup equals 4.22675283773 base units, and 1 gram per gallon equals 0.264172052358 base units, so dividing one by the other gives the direct gram per cup-to-gram per gallon factor of 16.
Simple example
1 g/cup × 16 = 16 g/gal
1 gram per cup = 16 grams per gallon.
Real-world example
1,000 g/cup × 16 = 16,000 g/gal
1,000 grams per cup = 16,000 grams per gallon.
Conversion table
| Gram per Cup (g/cup) | Gram per Gallon (g/gal) |
|---|---|
| 0.1 g/cup | 1.6 g/gal |
| 1 g/cup | 16 g/gal |
| 10 g/cup | 160 g/gal |
| 100 g/cup | 1,600 g/gal |
| 1,000 g/cup | 16,000 g/gal |
| 10,000 g/cup | 160,000 g/gal |
Reverse conversion: Gram per Gallon to Gram per Cup
16 g/gal × 0.0625 = 1 g/cup
16 grams per gallon = 1 gram per cup.
grams per cup = grams per gallon × 0.0625
For a page dedicated to this direction, see Gram per Gallon to Gram per Cup.
Understanding the Gram per Cup (g/cup)
Mass per volume density.
Understanding the Gram per Gallon (g/gal)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many grams per gallon are in 1 gram per cup?
1 gram per cup equals 16 grams per gallon, using the exact defined conversion factor rather than an estimate.
How do I convert gram per cup to gram per gallon?
Multiply the gram per cup value by 16. The converter above does this instantly to whatever precision you set.
How do I convert gram per gallon back to gram per cup?
Use the reverse factor: 1 gram per gallon equals 0.0625 grams per cup. You can also use the swap control in the converter above to flip the direction instantly.
What is a gram per cup?
Gram per Cup (g/cup) is a unit of density.
What is a gram per gallon?
Gram per Gallon (g/gal) is a unit of density.
Is the gram per cup to gram per gallon conversion exact?
Yes. Both gram per cup and gram per gallon are defined by fixed standards rather than physical artifacts, so the factor of 16 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.