Mass per volume density.
Grams per Imperial gallon to Grains per Cup Converter — g/imp gal to gr/cup
Convert Gram per Imperial gallon (g/imp gal) to Grain per Cup (gr/cup) using the exact conversion factor (1 gram per imperial gallon = 0.8031329005 grain per cup). See the formula, worked examples, and conversion table.
Grams per Imperial gallon to Grains 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 0.2199692483 / 0.2738889767.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Grams per Imperial gallon to Grains per Cup
Gram per Imperial gallon and Grain 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
grains per cup = grams per imperial gallon × 0.803132900527
This factor comes from each unit's defined relationship to the category's base unit: 1 gram per imperial gallon equals 0.219969248299 base units, and 1 grain per cup equals 0.273888976724 base units, so dividing one by the other gives the direct gram per imperial gallon-to-grain per cup factor of 0.803132900527.
Simple example
1 g/imp gal × 0.8031329005 = 0.8031329005 gr/cup
1 gram per imperial gallon = 0.8031329005 grains per cup.
Real-world example
1,000 g/imp gal × 0.8031329005 = 803.1329005 gr/cup
1,000 grams per imperial gallon = 803.1329005 grains per cup.
Conversion table
| Gram per Imperial gallon (g/imp gal) | Grain per Cup (gr/cup) |
|---|---|
| 0.1 g/imp gal | 0.0803132901 gr/cup |
| 1 g/imp gal | 0.8031329005 gr/cup |
| 10 g/imp gal | 8.031329005 gr/cup |
| 100 g/imp gal | 80.31329005 gr/cup |
| 1,000 g/imp gal | 803.1329005 gr/cup |
| 10,000 g/imp gal | 8,031.329005 gr/cup |
Reverse conversion: Grain per Cup to Gram per Imperial gallon
0.8031329005 gr/cup × 1.245123938 = 1 g/imp gal
0.8031329005 grains per cup = 1 grams per imperial gallon.
grams per imperial gallon = grains per cup × 1.2451239382
For a page dedicated to this direction, see Grain per Cup to Gram per Imperial gallon.
Understanding the Gram per Imperial gallon (g/imp gal)
Mass per volume density.
Understanding the Grain per Cup (gr/cup)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many grains per cup are in 1 gram per imperial gallon?
1 gram per imperial gallon equals 0.8031329005 grains per cup, using the exact defined conversion factor rather than an estimate.
How do I convert gram per imperial gallon to grain per cup?
Multiply the gram per imperial gallon value by 0.8031329005. The converter above does this instantly to whatever precision you set.
How do I convert grain per cup back to gram per imperial gallon?
Use the reverse factor: 1 grain per cup equals 1.245123938 grams per imperial gallon. You can also use the swap control in the converter above to flip the direction instantly.
What is a gram per imperial gallon?
Gram per Imperial gallon (g/imp gal) is a unit of density.
What is a grain per cup?
Grain per Cup (gr/cup) is a unit of density.
Is the gram per imperial gallon to grain per cup conversion exact?
Yes. Both gram per imperial gallon and grain per cup are defined by fixed standards rather than physical artifacts, so the factor of 0.8031329005 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.