Mass per volume density.
Grains per Teaspoon to Slugs per Cup Converter — gr/tsp to slug/cup
Convert Grain per Teaspoon (gr/tsp) to Slug per Cup (slug/cup) using the exact conversion factor (1 grain per teaspoon = 0.0002131265 slug per cup). See the formula, worked examples, and conversion table.
Grains per Teaspoon to Slugs per Cup 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 / 61684.82065.
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 Slugs per Cup
Grain per Teaspoon and Slug per Cup 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
slugs per cup = grains per teaspoon × 0.000213126515462
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 slug per cup equals 61684.8206534 base units, so dividing one by the other gives the direct grain per teaspoon-to-slug per cup factor of 0.000213126515462.
Simple example
1 gr/tsp × 0.0002131265155 = 0.0002131265 slug/cup
1 grain per teaspoon = 0.0002131265 slugs per cup.
Real-world example
1,000 gr/tsp × 0.0002131265155 = 0.2131265155 slug/cup
1,000 grains per teaspoon = 0.2131265155 slugs per cup.
Conversion table
| Grain per Teaspoon (gr/tsp) | Slug per Cup (slug/cup) |
|---|---|
| 0.1 gr/tsp | 0.0000213127 slug/cup |
| 1 gr/tsp | 0.0002131265 slug/cup |
| 10 gr/tsp | 0.0021312652 slug/cup |
| 100 gr/tsp | 0.0213126516 slug/cup |
| 1,000 gr/tsp | 0.2131265155 slug/cup |
| 10,000 gr/tsp | 2.131265155 slug/cup |
Reverse conversion: Slug per Cup to Grain per Teaspoon
0.0002131265 slug/cup × 4692.048748 = 0.9999999275 gr/tsp
0.0002131265 slugs per cup = 0.9999999275 grains per teaspoon.
grains per teaspoon = slugs per cup × 4692.04874781
For a page dedicated to this direction, see Slug per Cup to Grain per Teaspoon.
Understanding the Grain per Teaspoon (gr/tsp)
Mass per volume density.
Understanding the Slug per Cup (slug/cup)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many slugs per cup are in 1 grain per teaspoon?
1 grain per teaspoon equals 0.0002131265 slugs per cup, using the exact defined conversion factor rather than an estimate.
How do I convert grain per teaspoon to slug per cup?
Multiply the grain per teaspoon value by 0.0002131265155. The converter above does this instantly to whatever precision you set.
How do I convert slug per cup back to grain per teaspoon?
Use the reverse factor: 1 slug per cup equals 4,692.048748 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 slug per cup?
Slug per Cup (slug/cup) is a unit of density.
Is the grain per teaspoon to slug per cup conversion exact?
Yes. Both grain per teaspoon and slug per cup are defined by fixed standards rather than physical artifacts, so the factor of 0.0002131265155 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.