Mass per volume density.
Ounce per Cubic inches to Grains per Fluid ounce Converter — oz/in3 to gr/fl oz
Convert Ounce per Cubic inch (oz/in3) to Grain per Fluid ounce (gr/fl oz) using the exact conversion factor (1 ounce per cubic inch = 789.5507813 grain per fluid ounce). See the formula, worked examples, and conversion table.
Ounce per Cubic inches to Grains per Fluid ounce 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 1729.994044 / 2.191111814.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Ounce per Cubic inches to Grains per Fluid ounce
Ounce per Cubic inch and Grain per Fluid ounce 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 fluid ounce = ounce per cubic inches × 789.55078125
This factor comes from each unit's defined relationship to the category's base unit: 1 ounce per cubic inch equals 1729.99404439 base units, and 1 grain per fluid ounce equals 2.19111181379 base units, so dividing one by the other gives the direct ounce per cubic inch-to-grain per fluid ounce factor of 789.55078125.
Simple example
1 oz/in3 × 789.5507813 = 789.5507813 gr/fl oz
1 ounce per cubic inch = 789.5507813 grains per fluid ounce.
Real-world example
1,000 oz/in3 × 789.5507813 = 789,550.7813 gr/fl oz
1,000 ounce per cubic inches = 789,550.7813 grains per fluid ounce.
Conversion table
| Ounce per Cubic inch (oz/in3) | Grain per Fluid ounce (gr/fl oz) |
|---|---|
| 0.1 oz/in3 | 78.95507813 gr/fl oz |
| 1 oz/in3 | 789.5507813 gr/fl oz |
| 10 oz/in3 | 7,895.507813 gr/fl oz |
| 100 oz/in3 | 78,955.07813 gr/fl oz |
| 1,000 oz/in3 | 789,550.7813 gr/fl oz |
| 10,000 oz/in3 | 7,895,507.813 gr/fl oz |
Reverse conversion: Grain per Fluid ounce to Ounce per Cubic inch
789.5507813 gr/fl oz × 0.001266542981 = 1 oz/in3
789.5507813 grains per fluid ounce = 1 ounce per cubic inches.
ounce per cubic inches = grains per fluid ounce × 0.00126654298083
For a page dedicated to this direction, see Grain per Fluid ounce to Ounce per Cubic inch.
Understanding the Ounce per Cubic inch (oz/in3)
Mass per volume density.
Understanding the Grain per Fluid ounce (gr/fl oz)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many grains per fluid ounce are in 1 ounce per cubic inch?
1 ounce per cubic inch equals 789.5507813 grains per fluid ounce, using the exact defined conversion factor rather than an estimate.
How do I convert ounce per cubic inch to grain per fluid ounce?
Multiply the ounce per cubic inch value by 789.5507813. The converter above does this instantly to whatever precision you set.
How do I convert grain per fluid ounce back to ounce per cubic inch?
Use the reverse factor: 1 grain per fluid ounce equals 0.001266543 ounce per cubic inches. You can also use the swap control in the converter above to flip the direction instantly.
What is a ounce per cubic inch?
Ounce per Cubic inch (oz/in3) is a unit of density.
What is a grain per fluid ounce?
Grain per Fluid ounce (gr/fl oz) is a unit of density.
Is the ounce per cubic inch to grain per fluid ounce conversion exact?
Yes. Both ounce per cubic inch and grain per fluid ounce are defined by fixed standards rather than physical artifacts, so the factor of 789.5507813 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.