Mass per volume density.
Grams per Fluid ounce to Grains per Cup Converter — g/fl oz to gr/cup
Convert Gram per Fluid ounce (g/fl oz) to Grain per Cup (gr/cup) using the exact conversion factor (1 gram per fluid ounce = 123.4588668 grain per cup). See the formula, worked examples, and conversion table.
Grams per Fluid ounce 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 33.8140227 / 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 Fluid ounce to Grains per Cup
Gram per Fluid ounce 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 fluid ounce × 123.458866824
This factor comes from each unit's defined relationship to the category's base unit: 1 gram per fluid ounce equals 33.8140227018 base units, and 1 grain per cup equals 0.273888976724 base units, so dividing one by the other gives the direct gram per fluid ounce-to-grain per cup factor of 123.458866824.
Simple example
1 g/fl oz × 123.4588668 = 123.4588668 gr/cup
1 gram per fluid ounce = 123.4588668 grains per cup.
Real-world example
1,000 g/fl oz × 123.4588668 = 123,458.8668 gr/cup
1,000 grams per fluid ounce = 123,458.8668 grains per cup.
Conversion table
| Gram per Fluid ounce (g/fl oz) | Grain per Cup (gr/cup) |
|---|---|
| 0.1 g/fl oz | 12.34588668 gr/cup |
| 1 g/fl oz | 123.4588668 gr/cup |
| 10 g/fl oz | 1,234.588668 gr/cup |
| 100 g/fl oz | 12,345.88668 gr/cup |
| 1,000 g/fl oz | 123,458.8668 gr/cup |
| 10,000 g/fl oz | 1,234,588.668 gr/cup |
Reverse conversion: Grain per Cup to Gram per Fluid ounce
123.4588668 gr/cup × 0.00809986375 = 0.9999999998 g/fl oz
123.4588668 grains per cup = 0.9999999998 grams per fluid ounce.
grams per fluid ounce = grains per cup × 0.00809986375
For a page dedicated to this direction, see Grain per Cup to Gram per Fluid ounce.
Understanding the Gram per Fluid ounce (g/fl oz)
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 fluid ounce?
1 gram per fluid ounce equals 123.4588668 grains per cup, using the exact defined conversion factor rather than an estimate.
How do I convert gram per fluid ounce to grain per cup?
Multiply the gram per fluid ounce value by 123.4588668. The converter above does this instantly to whatever precision you set.
How do I convert grain per cup back to gram per fluid ounce?
Use the reverse factor: 1 grain per cup equals 0.0080998638 grams per fluid ounce. You can also use the swap control in the converter above to flip the direction instantly.
What is a gram per fluid ounce?
Gram per Fluid ounce (g/fl oz) 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 fluid ounce to grain per cup conversion exact?
Yes. Both gram per fluid ounce and grain per cup are defined by fixed standards rather than physical artifacts, so the factor of 123.4588668 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.