Mass per volume density.
Grains per Fluid ounce to Ounce per Cubic inches Converter — gr/fl oz to oz/in3
Convert Grain per Fluid ounce (gr/fl oz) to Ounce per Cubic inch (oz/in3) using the exact conversion factor (1 grain per fluid ounce = 0.001266543 ounce per cubic inch). See the formula, worked examples, and conversion table.
Grains per Fluid ounce to Ounce per Cubic inches 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 2.191111814 / 1729.994044.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Grains per Fluid ounce to Ounce per Cubic inches
Grain per Fluid ounce and Ounce per Cubic inch 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
ounce per cubic inches = grains per fluid ounce × 0.00126654298083
This factor comes from each unit's defined relationship to the category's base unit: 1 grain per fluid ounce equals 2.19111181379 base units, and 1 ounce per cubic inch equals 1729.99404439 base units, so dividing one by the other gives the direct grain per fluid ounce-to-ounce per cubic inch factor of 0.00126654298083.
Simple example
1 gr/fl oz × 0.001266542981 = 0.001266543 oz/in3
1 grain per fluid ounce = 0.001266543 ounce per cubic inches.
Real-world example
1,000 gr/fl oz × 0.001266542981 = 1.266542981 oz/in3
1,000 grains per fluid ounce = 1.266542981 ounce per cubic inches.
Conversion table
| Grain per Fluid ounce (gr/fl oz) | Ounce per Cubic inch (oz/in3) |
|---|---|
| 0.1 gr/fl oz | 0.0001266543 oz/in3 |
| 1 gr/fl oz | 0.001266543 oz/in3 |
| 10 gr/fl oz | 0.0126654298 oz/in3 |
| 100 gr/fl oz | 0.1266542981 oz/in3 |
| 1,000 gr/fl oz | 1.266542981 oz/in3 |
| 10,000 gr/fl oz | 12.66542981 oz/in3 |
Reverse conversion: Ounce per Cubic inch to Grain per Fluid ounce
0.001266543 oz/in3 × 789.5507813 = 1.000000015 gr/fl oz
0.001266543 ounce per cubic inches = 1.000000015 grains per fluid ounce.
grains per fluid ounce = ounce per cubic inches × 789.55078125
For a page dedicated to this direction, see Ounce per Cubic inch to Grain per Fluid ounce.
Understanding the Grain per Fluid ounce (gr/fl oz)
Mass per volume density.
Understanding the Ounce per Cubic inch (oz/in3)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many ounce per cubic inches are in 1 grain per fluid ounce?
1 grain per fluid ounce equals 0.001266543 ounce per cubic inches, using the exact defined conversion factor rather than an estimate.
How do I convert grain per fluid ounce to ounce per cubic inch?
Multiply the grain per fluid ounce value by 0.001266542981. The converter above does this instantly to whatever precision you set.
How do I convert ounce per cubic inch back to grain per fluid ounce?
Use the reverse factor: 1 ounce per cubic inch equals 789.5507813 grains per fluid ounce. You can also use the swap control in the converter above to flip the direction instantly.
What is a grain per fluid ounce?
Grain per Fluid ounce (gr/fl oz) is a unit of density.
What is a ounce per cubic inch?
Ounce per Cubic inch (oz/in3) is a unit of density.
Is the grain per fluid ounce to ounce per cubic inch conversion exact?
Yes. Both grain per fluid ounce and ounce per cubic inch are defined by fixed standards rather than physical artifacts, so the factor of 0.001266542981 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.