Mass per volume density.
Carats per Teaspoon to Stones per Teaspoon Converter — ct/tsp to st/tsp
Convert Carat per Teaspoon (ct/tsp) to Stone per Teaspoon (st/tsp) using the exact conversion factor (1 carat per teaspoon = 0.0000314946 stone per teaspoon). See the formula, worked examples, and conversion table.
Carats per Teaspoon 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 40.57682724 / 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 Teaspoon to Stones per Teaspoon
Carat per Teaspoon 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 teaspoon × 0.0000314946088836
This factor comes from each unit's defined relationship to the category's base unit: 1 carat per teaspoon equals 40.5768272422 base units, and 1 stone per teaspoon equals 1288373.74651 base units, so dividing one by the other gives the direct carat per teaspoon-to-stone per teaspoon factor of 0.0000314946088836.
Simple example
1 ct/tsp × 0.00003149460888 = 0.0000314946 st/tsp
1 carat per teaspoon = 0.0000314946 stones per teaspoon.
Real-world example
1,000 ct/tsp × 0.00003149460888 = 0.0314946089 st/tsp
1,000 carats per teaspoon = 0.0314946089 stones per teaspoon.
Conversion table
| Carat per Teaspoon (ct/tsp) | Stone per Teaspoon (st/tsp) |
|---|---|
| 0.1 ct/tsp | 0.0000031495 st/tsp |
| 1 ct/tsp | 0.0000314946 st/tsp |
| 10 ct/tsp | 0.0003149461 st/tsp |
| 100 ct/tsp | 0.0031494609 st/tsp |
| 1,000 ct/tsp | 0.0314946089 st/tsp |
| 10,000 ct/tsp | 0.3149460888 st/tsp |
Reverse conversion: Stone per Teaspoon to Carat per Teaspoon
0.0000314946 st/tsp × 31751.4659 = 0.9999997179 ct/tsp
0.0000314946 stones per teaspoon = 0.9999997179 carats per teaspoon.
carats per teaspoon = stones per teaspoon × 31751.4659
For a page dedicated to this direction, see Stone per Teaspoon to Carat per Teaspoon.
Understanding the Carat per Teaspoon (ct/tsp)
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 teaspoon?
1 carat per teaspoon equals 0.0000314946 stones per teaspoon, using the exact defined conversion factor rather than an estimate.
How do I convert carat per teaspoon to stone per teaspoon?
Multiply the carat per teaspoon value by 0.00003149460888. The converter above does this instantly to whatever precision you set.
How do I convert stone per teaspoon back to carat per teaspoon?
Use the reverse factor: 1 stone per teaspoon equals 31,751.4659 carats per teaspoon. You can also use the swap control in the converter above to flip the direction instantly.
What is a carat per teaspoon?
Carat per Teaspoon (ct/tsp) 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 teaspoon to stone per teaspoon conversion exact?
Yes. Both carat per teaspoon and stone per teaspoon are defined by fixed standards rather than physical artifacts, so the factor of 0.00003149460888 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.