Mass per volume density.
Grains per Teaspoon to Carats per Cubic Millimeter Converter — gr/tsp to ct/mm3
Convert Grain per Teaspoon (gr/tsp) to Carat per Cubic Millimeter (ct/mm3) using the exact conversion factor (1 grain per teaspoon = 0.0000657334 carat per cubic millimeter). See the formula, worked examples, and conversion table.
Grains per Teaspoon to Carats per Cubic Millimeter 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 / 200000.
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 Carats per Cubic Millimeter
Grain per Teaspoon and Carat per Cubic Millimeter 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
carats per cubic millimeter = grains per teaspoon × 0.0000657333544138
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 carat per cubic millimeter equals 200000 base units, so dividing one by the other gives the direct grain per teaspoon-to-carat per cubic millimeter factor of 0.0000657333544138.
Simple example
1 gr/tsp × 0.00006573335441 = 0.0000657334 ct/mm3
1 grain per teaspoon = 0.0000657334 carats per cubic millimeter.
Real-world example
1,000 gr/tsp × 0.00006573335441 = 0.0657333544 ct/mm3
1,000 grains per teaspoon = 0.0657333544 carats per cubic millimeter.
Conversion table
| Grain per Teaspoon (gr/tsp) | Carat per Cubic Millimeter (ct/mm3) |
|---|---|
| 0.1 gr/tsp | 0.0000065733 ct/mm3 |
| 1 gr/tsp | 0.0000657334 ct/mm3 |
| 10 gr/tsp | 0.0006573335 ct/mm3 |
| 100 gr/tsp | 0.0065733354 ct/mm3 |
| 1,000 gr/tsp | 0.0657333544 ct/mm3 |
| 10,000 gr/tsp | 0.6573335441 ct/mm3 |
Reverse conversion: Carat per Cubic Millimeter to Grain per Teaspoon
0.0000657334 ct/mm3 × 15212.97687 = 1.000000694 gr/tsp
0.0000657334 carats per cubic millimeter = 1.000000694 grains per teaspoon.
grains per teaspoon = carats per cubic millimeter × 15212.9768657
For a page dedicated to this direction, see Carat per Cubic Millimeter to Grain per Teaspoon.
Understanding the Grain per Teaspoon (gr/tsp)
Mass per volume density.
Understanding the Carat per Cubic Millimeter (ct/mm3)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many carats per cubic millimeter are in 1 grain per teaspoon?
1 grain per teaspoon equals 0.0000657334 carats per cubic millimeter, using the exact defined conversion factor rather than an estimate.
How do I convert grain per teaspoon to carat per cubic millimeter?
Multiply the grain per teaspoon value by 0.00006573335441. The converter above does this instantly to whatever precision you set.
How do I convert carat per cubic millimeter back to grain per teaspoon?
Use the reverse factor: 1 carat per cubic millimeter equals 15,212.97687 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 carat per cubic millimeter?
Carat per Cubic Millimeter (ct/mm3) is a unit of density.
Is the grain per teaspoon to carat per cubic millimeter conversion exact?
Yes. Both grain per teaspoon and carat per cubic millimeter are defined by fixed standards rather than physical artifacts, so the factor of 0.00006573335441 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.