Mass per volume density.
Ounce per Cubic inches to Grain per Cubic inches Converter — oz/in3 to gr/in3
Convert Ounce per Cubic inch (oz/in3) to Grain per Cubic inch (gr/in3) using the exact conversion factor (1 ounce per cubic inch = 437.5 grain per cubic inch). See the formula, worked examples, and conversion table.
Ounce per Cubic inches to Grain 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 1729.994044 / 3.954272101.
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 Grain per Cubic inches
Ounce per Cubic inch and Grain 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
grain per cubic inches = ounce per cubic inches × 437.5
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 cubic inch equals 3.95427210146 base units, so dividing one by the other gives the direct ounce per cubic inch-to-grain per cubic inch factor of 437.5.
Simple example
1 oz/in3 × 437.5 = 437.5 gr/in3
1 ounce per cubic inch = 437.5 grain per cubic inches.
Real-world example
1,000 oz/in3 × 437.5 = 437,500 gr/in3
1,000 ounce per cubic inches = 437,500 grain per cubic inches.
Conversion table
| Ounce per Cubic inch (oz/in3) | Grain per Cubic inch (gr/in3) |
|---|---|
| 0.1 oz/in3 | 43.75 gr/in3 |
| 1 oz/in3 | 437.5 gr/in3 |
| 10 oz/in3 | 4,375 gr/in3 |
| 100 oz/in3 | 43,750 gr/in3 |
| 1,000 oz/in3 | 437,500 gr/in3 |
| 10,000 oz/in3 | 4,375,000 gr/in3 |
Reverse conversion: Grain per Cubic inch to Ounce per Cubic inch
437.5 gr/in3 × 0.002285714286 = 1 oz/in3
437.5 grain per cubic inches = 1 ounce per cubic inches.
ounce per cubic inches = grain per cubic inches × 0.00228571428571
For a page dedicated to this direction, see Grain per Cubic inch to Ounce per Cubic inch.
Understanding the Ounce per Cubic inch (oz/in3)
Mass per volume density.
Understanding the Grain per Cubic inch (gr/in3)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many grain per cubic inches are in 1 ounce per cubic inch?
1 ounce per cubic inch equals 437.5 grain per cubic inches, using the exact defined conversion factor rather than an estimate.
How do I convert ounce per cubic inch to grain per cubic inch?
Multiply the ounce per cubic inch value by 437.5. The converter above does this instantly to whatever precision you set.
How do I convert grain per cubic inch back to ounce per cubic inch?
Use the reverse factor: 1 grain per cubic inch equals 0.0022857143 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 cubic inch?
Grain per Cubic inch (gr/in3) is a unit of density.
Is the ounce per cubic inch to grain per cubic inch conversion exact?
Yes. Both ounce per cubic inch and grain per cubic inch are defined by fixed standards rather than physical artifacts, so the factor of 437.5 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.