Mass per volume density.
Grams per Cup to Grains per Gallon Converter — g/cup to gr/gal
Convert Gram per Cup (g/cup) to Grain per Gallon (gr/gal) using the exact conversion factor (1 gram per cup = 246.9177336 grain per gallon). See the formula, worked examples, and conversion table.
Grams per Cup to Grains 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 / 0.01711806105.
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 Grains per Gallon
Gram per Cup and Grain 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
grains per gallon = grams per cup × 246.917733647
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 grain per gallon equals 0.0171180610453 base units, so dividing one by the other gives the direct gram per cup-to-grain per gallon factor of 246.917733647.
Simple example
1 g/cup × 246.9177336 = 246.9177336 gr/gal
1 gram per cup = 246.9177336 grains per gallon.
Real-world example
1,000 g/cup × 246.9177336 = 246,917.7336 gr/gal
1,000 grams per cup = 246,917.7336 grains per gallon.
Conversion table
| Gram per Cup (g/cup) | Grain per Gallon (gr/gal) |
|---|---|
| 0.1 g/cup | 24.69177336 gr/gal |
| 1 g/cup | 246.9177336 gr/gal |
| 10 g/cup | 2,469.177336 gr/gal |
| 100 g/cup | 24,691.77336 gr/gal |
| 1,000 g/cup | 246,917.7336 gr/gal |
| 10,000 g/cup | 2,469,177.336 gr/gal |
Reverse conversion: Grain per Gallon to Gram per Cup
246.9177336 gr/gal × 0.004049931875 = 0.9999999998 g/cup
246.9177336 grains per gallon = 0.9999999998 grams per cup.
grams per cup = grains per gallon × 0.004049931875
For a page dedicated to this direction, see Grain per Gallon to Gram per Cup.
Understanding the Gram per Cup (g/cup)
Mass per volume density.
Understanding the Grain per Gallon (gr/gal)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many grains per gallon are in 1 gram per cup?
1 gram per cup equals 246.9177336 grains per gallon, using the exact defined conversion factor rather than an estimate.
How do I convert gram per cup to grain per gallon?
Multiply the gram per cup value by 246.9177336. The converter above does this instantly to whatever precision you set.
How do I convert grain per gallon back to gram per cup?
Use the reverse factor: 1 grain per gallon equals 0.0040499319 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 grain per gallon?
Grain per Gallon (gr/gal) is a unit of density.
Is the gram per cup to grain per gallon conversion exact?
Yes. Both gram per cup and grain per gallon are defined by fixed standards rather than physical artifacts, so the factor of 246.9177336 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.