Mass per volume density.
Carats per Milliliter to Stones per Teaspoon Converter — ct/mL to st/tsp
Convert Carat per Milliliter (ct/mL) to Stone per Teaspoon (st/tsp) using the exact conversion factor (1 carat per milliliter = 0.0001552345 stone per teaspoon). See the formula, worked examples, and conversion table.
Carats per Milliliter to Stones 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 200 / 1.28837375e+6.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Carats per Milliliter to Stones per Teaspoon
Carat per Milliliter and Stone 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
stones per teaspoon = carats per milliliter × 0.000155234457813
This factor comes from each unit's defined relationship to the category's base unit: 1 carat per milliliter equals 200 base units, and 1 stone per teaspoon equals 1288373.74651 base units, so dividing one by the other gives the direct carat per milliliter-to-stone per teaspoon factor of 0.000155234457813.
Simple example
1 ct/mL × 0.0001552344578 = 0.0001552345 st/tsp
1 carat per milliliter = 0.0001552345 stones per teaspoon.
Real-world example
1,000 ct/mL × 0.0001552344578 = 0.1552344578 st/tsp
1,000 carats per milliliter = 0.1552344578 stones per teaspoon.
Conversion table
| Carat per Milliliter (ct/mL) | Stone per Teaspoon (st/tsp) |
|---|---|
| 0.1 ct/mL | 0.0000155234 st/tsp |
| 1 ct/mL | 0.0001552345 st/tsp |
| 10 ct/mL | 0.0015523446 st/tsp |
| 100 ct/mL | 0.0155234458 st/tsp |
| 1,000 ct/mL | 0.1552344578 st/tsp |
| 10,000 ct/mL | 1.552344578 st/tsp |
Reverse conversion: Stone per Teaspoon to Carat per Milliliter
0.0001552345 st/tsp × 6441.868733 = 1.000000272 ct/mL
0.0001552345 stones per teaspoon = 1.000000272 carats per milliliter.
carats per milliliter = stones per teaspoon × 6441.86873256
For a page dedicated to this direction, see Stone per Teaspoon to Carat per Milliliter.
Understanding the Carat per Milliliter (ct/mL)
Mass per volume density.
Understanding the Stone per Teaspoon (st/tsp)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many stones per teaspoon are in 1 carat per milliliter?
1 carat per milliliter equals 0.0001552345 stones per teaspoon, using the exact defined conversion factor rather than an estimate.
How do I convert carat per milliliter to stone per teaspoon?
Multiply the carat per milliliter value by 0.0001552344578. The converter above does this instantly to whatever precision you set.
How do I convert stone per teaspoon back to carat per milliliter?
Use the reverse factor: 1 stone per teaspoon equals 6,441.868733 carats per milliliter. You can also use the swap control in the converter above to flip the direction instantly.
What is a carat per milliliter?
Carat per Milliliter (ct/mL) is a unit of density.
What is a stone per teaspoon?
Stone per Teaspoon (st/tsp) is a unit of density.
Is the carat per milliliter to stone per teaspoon conversion exact?
Yes. Both carat per milliliter and stone per teaspoon are defined by fixed standards rather than physical artifacts, so the factor of 0.0001552344578 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.