Mass per volume density.
Stones per Teaspoon to Carats per Milliliter Converter — st/tsp to ct/mL
Convert Stone per Teaspoon (st/tsp) to Carat per Milliliter (ct/mL) using the exact conversion factor (1 stone per teaspoon = 6,441.868733 carat per milliliter). See the formula, worked examples, and conversion table.
Stones per Teaspoon to Carats per Milliliter 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 1.28837375e+6 / 200.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Stones per Teaspoon to Carats per Milliliter
Stone per Teaspoon and Carat per Milliliter 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 milliliter = stones per teaspoon × 6441.86873256
This factor comes from each unit's defined relationship to the category's base unit: 1 stone per teaspoon equals 1288373.74651 base units, and 1 carat per milliliter equals 200 base units, so dividing one by the other gives the direct stone per teaspoon-to-carat per milliliter factor of 6441.86873256.
Simple example
1 st/tsp × 6441.868733 = 6,441.868733 ct/mL
1 stone per teaspoon = 6,441.868733 carats per milliliter.
Real-world example
1,000 st/tsp × 6441.868733 = 6,441,868.733 ct/mL
1,000 stones per teaspoon = 6,441,868.733 carats per milliliter.
Conversion table
| Stone per Teaspoon (st/tsp) | Carat per Milliliter (ct/mL) |
|---|---|
| 0.1 st/tsp | 644.1868733 ct/mL |
| 1 st/tsp | 6,441.868733 ct/mL |
| 10 st/tsp | 64,418.68733 ct/mL |
| 100 st/tsp | 644,186.8733 ct/mL |
| 1,000 st/tsp | 6,441,868.733 ct/mL |
| 10,000 st/tsp | 64,418,687.33 ct/mL |
Reverse conversion: Carat per Milliliter to Stone per Teaspoon
1 ct/mL × 0.0001552344578 = 0.0001552345 st/tsp
1 carat per milliliter = 0.0001552345 stones per teaspoon.
stones per teaspoon = carats per milliliter × 0.000155234457813
For a page dedicated to this direction, see Carat per Milliliter to Stone per Teaspoon.
Understanding the Stone per Teaspoon (st/tsp)
Mass per volume density.
Understanding the Carat per Milliliter (ct/mL)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many carats per milliliter are in 1 stone per teaspoon?
1 stone per teaspoon equals 6,441.868733 carats per milliliter, using the exact defined conversion factor rather than an estimate.
How do I convert stone per teaspoon to carat per milliliter?
Multiply the stone per teaspoon value by 6441.868733. The converter above does this instantly to whatever precision you set.
How do I convert carat per milliliter back to stone per teaspoon?
Use the reverse factor: 1 carat per milliliter equals 0.0001552345 stones per teaspoon. You can also use the swap control in the converter above to flip the direction instantly.
What is a stone per teaspoon?
Stone per Teaspoon (st/tsp) is a unit of density.
What is a carat per milliliter?
Carat per Milliliter (ct/mL) is a unit of density.
Is the stone per teaspoon to carat per milliliter conversion exact?
Yes. Both stone per teaspoon and carat per milliliter are defined by fixed standards rather than physical artifacts, so the factor of 6441.868733 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.