Mass per volume density.
Grains per Cup to Megagrams per Teaspoon Converter — gr/cup to Mg/tsp
Convert Grain per Cup (gr/cup) to Megagram per Teaspoon (Mg/tsp) using the exact conversion factor (1 grain per cup = 1.349977e-9 megagram per teaspoon). See the formula, worked examples, and conversion table.
Grains per Cup to Megagrams 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 0.2738889767 / 2.02884136e+8.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Grains per Cup to Megagrams per Teaspoon
Grain per Cup and Megagram 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
megagrams per teaspoon = grains per cup × 1.349977e-9
This factor comes from each unit's defined relationship to the category's base unit: 1 grain per cup equals 0.273888976724 base units, and 1 megagram per teaspoon equals 202884136.211 base units, so dividing one by the other gives the direct grain per cup-to-megagram per teaspoon factor of 1.349977e-9.
Simple example
1 gr/cup × 1.349977e-9 = 1.349977e-9 Mg/tsp
1 grain per cup = 1.349977e-9 megagrams per teaspoon.
Real-world example
1,000 gr/cup × 1.349977e-9 = 0.00000135 Mg/tsp
1,000 grains per cup = 0.00000135 megagrams per teaspoon.
Conversion table
| Grain per Cup (gr/cup) | Megagram per Teaspoon (Mg/tsp) |
|---|---|
| 0.1 gr/cup | 1.349977e-10 Mg/tsp |
| 1 gr/cup | 1.349977e-9 Mg/tsp |
| 10 gr/cup | 1.349977e-8 Mg/tsp |
| 100 gr/cup | 1.349977e-7 Mg/tsp |
| 1,000 gr/cup | 0.00000135 Mg/tsp |
| 10,000 gr/cup | 0.0000134998 Mg/tsp |
Reverse conversion: Megagram per Teaspoon to Grain per Cup
1.349977e-9 Mg/tsp × 740753200.9 = 0.9999997839 gr/cup
1.349977e-9 megagrams per teaspoon = 0.9999997839 grains per cup.
grains per cup = megagrams per teaspoon × 740753200.941
For a page dedicated to this direction, see Megagram per Teaspoon to Grain per Cup.
Understanding the Grain per Cup (gr/cup)
Mass per volume density.
Understanding the Megagram 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 megagrams per teaspoon are in 1 grain per cup?
1 grain per cup equals 1.349977e-9 megagrams per teaspoon, using the exact defined conversion factor rather than an estimate.
How do I convert grain per cup to megagram per teaspoon?
Multiply the grain per cup value by 1.349977e-9. The converter above does this instantly to whatever precision you set.
How do I convert megagram per teaspoon back to grain per cup?
Use the reverse factor: 1 megagram per teaspoon equals 740,753,200.9 grains per cup. You can also use the swap control in the converter above to flip the direction instantly.
What is a grain per cup?
Grain per Cup (gr/cup) is a unit of density.
What is a megagram per teaspoon?
Megagram per Teaspoon (Mg/tsp) is a unit of density.
Is the grain per cup to megagram per teaspoon conversion exact?
Yes. Both grain per cup and megagram per teaspoon are defined by fixed standards rather than physical artifacts, so the factor of 1.349977e-9 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.