Mass per volume density.
Grains per Teaspoon to Milligrams per Teaspoon Converter — gr/tsp to mg/tsp
Convert Grain per Teaspoon (gr/tsp) to Milligram per Teaspoon (mg/tsp) using the exact conversion factor (1 grain per teaspoon = 64.79891 milligram per teaspoon). See the formula, worked examples, and conversion table.
Grains per Teaspoon to Milligrams 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 13.14667088 / 0.2028841362.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Grains per Teaspoon to Milligrams per Teaspoon
Grain per Teaspoon and Milligram 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
milligrams per teaspoon = grains per teaspoon × 64.79891
This factor comes from each unit's defined relationship to the category's base unit: 1 grain per teaspoon equals 13.1466708828 base units, and 1 milligram per teaspoon equals 0.202884136211 base units, so dividing one by the other gives the direct grain per teaspoon-to-milligram per teaspoon factor of 64.79891.
Simple example
1 gr/tsp × 64.79891 = 64.79891 mg/tsp
1 grain per teaspoon = 64.79891 milligrams per teaspoon.
Real-world example
1,000 gr/tsp × 64.79891 = 64,798.91 mg/tsp
1,000 grains per teaspoon = 64,798.91 milligrams per teaspoon.
Conversion table
| Grain per Teaspoon (gr/tsp) | Milligram per Teaspoon (mg/tsp) |
|---|---|
| 0.1 gr/tsp | 6.479891 mg/tsp |
| 1 gr/tsp | 64.79891 mg/tsp |
| 10 gr/tsp | 647.9891 mg/tsp |
| 100 gr/tsp | 6,479.891 mg/tsp |
| 1,000 gr/tsp | 64,798.91 mg/tsp |
| 10,000 gr/tsp | 647,989.1 mg/tsp |
Reverse conversion: Milligram per Teaspoon to Grain per Teaspoon
64.79891 mg/tsp × 0.01543235835 = 1 gr/tsp
64.79891 milligrams per teaspoon = 1 grains per teaspoon.
grains per teaspoon = milligrams per teaspoon × 0.0154323583529
For a page dedicated to this direction, see Milligram per Teaspoon to Grain per Teaspoon.
Understanding the Grain per Teaspoon (gr/tsp)
Mass per volume density.
Understanding the Milligram per Teaspoon (mg/tsp)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many milligrams per teaspoon are in 1 grain per teaspoon?
1 grain per teaspoon equals 64.79891 milligrams per teaspoon, using the exact defined conversion factor rather than an estimate.
How do I convert grain per teaspoon to milligram per teaspoon?
Multiply the grain per teaspoon value by 64.79891. The converter above does this instantly to whatever precision you set.
How do I convert milligram per teaspoon back to grain per teaspoon?
Use the reverse factor: 1 milligram per teaspoon equals 0.0154323584 grains per teaspoon. You can also use the swap control in the converter above to flip the direction instantly.
What is a grain per teaspoon?
Grain per Teaspoon (gr/tsp) is a unit of density.
What is a milligram per teaspoon?
Milligram per Teaspoon (mg/tsp) is a unit of density.
Is the grain per teaspoon to milligram per teaspoon conversion exact?
Yes. Both grain per teaspoon and milligram per teaspoon are defined by fixed standards rather than physical artifacts, so the factor of 64.79891 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.