Mass per volume density.
Ounces per Cubic foot to Grains per Cubic Millimeter Converter — oz/ft3 to gr/mm3
Convert Ounce per Cubic foot (oz/ft3) to Grain per Cubic Millimeter (gr/mm3) using the exact conversion factor (1 ounce per cubic foot = 0.0000154502 grain per cubic millimeter). See the formula, worked examples, and conversion table.
Ounces per Cubic foot to Grains per Cubic Millimeter 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 1.001153961 / 64798.91.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Ounces per Cubic foot to Grains per Cubic Millimeter
Ounce per Cubic foot and Grain per Cubic Millimeter 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 cubic millimeter = ounces per cubic foot × 0.0000154501666907
This factor comes from each unit's defined relationship to the category's base unit: 1 ounce per cubic foot equals 1.00115396087 base units, and 1 grain per cubic millimeter equals 64798.91 base units, so dividing one by the other gives the direct ounce per cubic foot-to-grain per cubic millimeter factor of 0.0000154501666907.
Simple example
1 oz/ft3 × 0.00001545016669 = 0.0000154502 gr/mm3
1 ounce per cubic foot = 0.0000154502 grains per cubic millimeter.
Real-world example
1,000 oz/ft3 × 0.00001545016669 = 0.0154501667 gr/mm3
1,000 ounces per cubic foot = 0.0154501667 grains per cubic millimeter.
Conversion table
| Ounce per Cubic foot (oz/ft3) | Grain per Cubic Millimeter (gr/mm3) |
|---|---|
| 0.1 oz/ft3 | 0.000001545 gr/mm3 |
| 1 oz/ft3 | 0.0000154502 gr/mm3 |
| 10 oz/ft3 | 0.0001545017 gr/mm3 |
| 100 oz/ft3 | 0.0015450167 gr/mm3 |
| 1,000 oz/ft3 | 0.0154501667 gr/mm3 |
| 10,000 oz/ft3 | 0.1545016669 gr/mm3 |
Reverse conversion: Grain per Cubic Millimeter to Ounce per Cubic foot
0.0000154502 gr/mm3 × 64724.22078 = 1.000002156 oz/ft3
0.0000154502 grains per cubic millimeter = 1.000002156 ounces per cubic foot.
ounces per cubic foot = grains per cubic millimeter × 64724.2207817
For a page dedicated to this direction, see Grain per Cubic Millimeter to Ounce per Cubic foot.
Understanding the Ounce per Cubic foot (oz/ft3)
Mass per volume density.
Understanding the Grain per Cubic Millimeter (gr/mm3)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many grains per cubic millimeter are in 1 ounce per cubic foot?
1 ounce per cubic foot equals 0.0000154502 grains per cubic millimeter, using the exact defined conversion factor rather than an estimate.
How do I convert ounce per cubic foot to grain per cubic millimeter?
Multiply the ounce per cubic foot value by 0.00001545016669. The converter above does this instantly to whatever precision you set.
How do I convert grain per cubic millimeter back to ounce per cubic foot?
Use the reverse factor: 1 grain per cubic millimeter equals 64,724.22078 ounces per cubic foot. You can also use the swap control in the converter above to flip the direction instantly.
What is a ounce per cubic foot?
Ounce per Cubic foot (oz/ft3) is a unit of density.
What is a grain per cubic millimeter?
Grain per Cubic Millimeter (gr/mm3) is a unit of density.
Is the ounce per cubic foot to grain per cubic millimeter conversion exact?
Yes. Both ounce per cubic foot and grain per cubic millimeter are defined by fixed standards rather than physical artifacts, so the factor of 0.00001545016669 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.