Mass per volume density.
Ounces per Teaspoon to Grains per Teaspoon Converter — oz/tsp to gr/tsp
Convert Ounce per Teaspoon (oz/tsp) to Grain per Teaspoon (gr/tsp) using the exact conversion factor (1 ounce per teaspoon = 437.5 grain per teaspoon). See the formula, worked examples, and conversion table.
Ounces per Teaspoon 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 5751.668511 / 13.14667088.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Ounces per Teaspoon to Grains per Teaspoon
Ounce per Teaspoon 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 = ounces per teaspoon × 437.5
This factor comes from each unit's defined relationship to the category's base unit: 1 ounce per teaspoon equals 5751.66851121 base units, and 1 grain per teaspoon equals 13.1466708828 base units, so dividing one by the other gives the direct ounce per teaspoon-to-grain per teaspoon factor of 437.5.
Simple example
1 oz/tsp × 437.5 = 437.5 gr/tsp
1 ounce per teaspoon = 437.5 grains per teaspoon.
Real-world example
1,000 oz/tsp × 437.5 = 437,500 gr/tsp
1,000 ounces per teaspoon = 437,500 grains per teaspoon.
Conversion table
| Ounce per Teaspoon (oz/tsp) | Grain per Teaspoon (gr/tsp) |
|---|---|
| 0.1 oz/tsp | 43.75 gr/tsp |
| 1 oz/tsp | 437.5 gr/tsp |
| 10 oz/tsp | 4,375 gr/tsp |
| 100 oz/tsp | 43,750 gr/tsp |
| 1,000 oz/tsp | 437,500 gr/tsp |
| 10,000 oz/tsp | 4,375,000 gr/tsp |
Reverse conversion: Grain per Teaspoon to Ounce per Teaspoon
437.5 gr/tsp × 0.002285714286 = 1 oz/tsp
437.5 grains per teaspoon = 1 ounces per teaspoon.
ounces per teaspoon = grains per teaspoon × 0.00228571428571
For a page dedicated to this direction, see Grain per Teaspoon to Ounce per Teaspoon.
Understanding the Ounce per Teaspoon (oz/tsp)
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 teaspoon?
1 ounce per teaspoon equals 437.5 grains per teaspoon, using the exact defined conversion factor rather than an estimate.
How do I convert ounce per teaspoon to grain per teaspoon?
Multiply the ounce per teaspoon value by 437.5. The converter above does this instantly to whatever precision you set.
How do I convert grain per teaspoon back to ounce per teaspoon?
Use the reverse factor: 1 grain per teaspoon equals 0.0022857143 ounces per teaspoon. You can also use the swap control in the converter above to flip the direction instantly.
What is a ounce per teaspoon?
Ounce per Teaspoon (oz/tsp) 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 teaspoon to grain per teaspoon conversion exact?
Yes. Both ounce per teaspoon and grain per teaspoon 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.