Mass per volume density.
Ounce per Cubic inches to Grains per Teaspoon Converter — oz/in3 to gr/tsp
Convert Ounce per Cubic inch (oz/in3) to Grain per Teaspoon (gr/tsp) using the exact conversion factor (1 ounce per cubic inch = 131.5917969 grain per teaspoon). See the formula, worked examples, and conversion table.
Ounce per Cubic inches to Grains per Teaspoon 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 / 13.14667088.
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 Teaspoon
Ounce per Cubic inch and Grain per Teaspoon 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 teaspoon = ounce per cubic inches × 131.591796875
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 teaspoon equals 13.1466708828 base units, so dividing one by the other gives the direct ounce per cubic inch-to-grain per teaspoon factor of 131.591796875.
Simple example
1 oz/in3 × 131.5917969 = 131.5917969 gr/tsp
1 ounce per cubic inch = 131.5917969 grains per teaspoon.
Real-world example
1,000 oz/in3 × 131.5917969 = 131,591.7969 gr/tsp
1,000 ounce per cubic inches = 131,591.7969 grains per teaspoon.
Conversion table
| Ounce per Cubic inch (oz/in3) | Grain per Teaspoon (gr/tsp) |
|---|---|
| 0.1 oz/in3 | 13.15917969 gr/tsp |
| 1 oz/in3 | 131.5917969 gr/tsp |
| 10 oz/in3 | 1,315.917969 gr/tsp |
| 100 oz/in3 | 13,159.17969 gr/tsp |
| 1,000 oz/in3 | 131,591.7969 gr/tsp |
| 10,000 oz/in3 | 1,315,917.969 gr/tsp |
Reverse conversion: Grain per Teaspoon to Ounce per Cubic inch
131.5917969 gr/tsp × 0.007599257885 = 1 oz/in3
131.5917969 grains per teaspoon = 1 ounce per cubic inches.
ounce per cubic inches = grains per teaspoon × 0.00759925788497
For a page dedicated to this direction, see Grain per Teaspoon to Ounce per Cubic inch.
Understanding the Ounce per Cubic inch (oz/in3)
Mass per volume density.
Understanding the Grain per Teaspoon (gr/tsp)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many grains per teaspoon are in 1 ounce per cubic inch?
1 ounce per cubic inch equals 131.5917969 grains per teaspoon, using the exact defined conversion factor rather than an estimate.
How do I convert ounce per cubic inch to grain per teaspoon?
Multiply the ounce per cubic inch value by 131.5917969. The converter above does this instantly to whatever precision you set.
How do I convert grain per teaspoon back to ounce per cubic inch?
Use the reverse factor: 1 grain per teaspoon equals 0.0075992579 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 teaspoon?
Grain per Teaspoon (gr/tsp) is a unit of density.
Is the ounce per cubic inch to grain per teaspoon conversion exact?
Yes. Both ounce per cubic inch and grain per teaspoon are defined by fixed standards rather than physical artifacts, so the factor of 131.5917969 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.