Mass per volume density.
Milligrams per Teaspoon to Grains per Gallon Converter — mg/tsp to gr/gal
Convert Milligram per Teaspoon (mg/tsp) to Grain per Gallon (gr/gal) using the exact conversion factor (1 milligram per teaspoon = 11.85205122 grain per gallon). See the formula, worked examples, and conversion table.
Milligrams per Teaspoon to Grains per Gallon 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 0.2028841362 / 0.01711806105.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Milligrams per Teaspoon to Grains per Gallon
Milligram per Teaspoon and Grain per Gallon 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 gallon = milligrams per teaspoon × 11.8520512151
This factor comes from each unit's defined relationship to the category's base unit: 1 milligram per teaspoon equals 0.202884136211 base units, and 1 grain per gallon equals 0.0171180610453 base units, so dividing one by the other gives the direct milligram per teaspoon-to-grain per gallon factor of 11.8520512151.
Simple example
1 mg/tsp × 11.85205122 = 11.85205122 gr/gal
1 milligram per teaspoon = 11.85205122 grains per gallon.
Real-world example
1,000 mg/tsp × 11.85205122 = 11,852.05122 gr/gal
1,000 milligrams per teaspoon = 11,852.05122 grains per gallon.
Conversion table
| Milligram per Teaspoon (mg/tsp) | Grain per Gallon (gr/gal) |
|---|---|
| 0.1 mg/tsp | 1.185205122 gr/gal |
| 1 mg/tsp | 11.85205122 gr/gal |
| 10 mg/tsp | 118.5205122 gr/gal |
| 100 mg/tsp | 1,185.205122 gr/gal |
| 1,000 mg/tsp | 11,852.05122 gr/gal |
| 10,000 mg/tsp | 118,520.5122 gr/gal |
Reverse conversion: Grain per Gallon to Milligram per Teaspoon
11.85205122 gr/gal × 0.08437358073 = 1 mg/tsp
11.85205122 grains per gallon = 1 milligrams per teaspoon.
milligrams per teaspoon = grains per gallon × 0.0843735807292
For a page dedicated to this direction, see Grain per Gallon to Milligram per Teaspoon.
Understanding the Milligram per Teaspoon (mg/tsp)
Mass per volume density.
Understanding the Grain per Gallon (gr/gal)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many grains per gallon are in 1 milligram per teaspoon?
1 milligram per teaspoon equals 11.85205122 grains per gallon, using the exact defined conversion factor rather than an estimate.
How do I convert milligram per teaspoon to grain per gallon?
Multiply the milligram per teaspoon value by 11.85205122. The converter above does this instantly to whatever precision you set.
How do I convert grain per gallon back to milligram per teaspoon?
Use the reverse factor: 1 grain per gallon equals 0.0843735807 milligrams per teaspoon. You can also use the swap control in the converter above to flip the direction instantly.
What is a milligram per teaspoon?
Milligram per Teaspoon (mg/tsp) is a unit of density.
What is a grain per gallon?
Grain per Gallon (gr/gal) is a unit of density.
Is the milligram per teaspoon to grain per gallon conversion exact?
Yes. Both milligram per teaspoon and grain per gallon are defined by fixed standards rather than physical artifacts, so the factor of 11.85205122 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.