Mass per volume density.
Carats per Quart to Stones per Teaspoon Converter — ct/qt to st/tsp
Convert Carat per Quart (ct/qt) to Stone per Teaspoon (st/tsp) using the exact conversion factor (1 carat per quart = 1.640344e-7 stone per teaspoon). See the formula, worked examples, and conversion table.
Carats per Quart 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 0.2113376419 / 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 Quart to Stones per Teaspoon
Carat per Quart 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 quart × 1.640344e-7
This factor comes from each unit's defined relationship to the category's base unit: 1 carat per quart equals 0.211337641887 base units, and 1 stone per teaspoon equals 1288373.74651 base units, so dividing one by the other gives the direct carat per quart-to-stone per teaspoon factor of 1.640344e-7.
Simple example
1 ct/qt × 1.640344e-7 = 1.640344e-7 st/tsp
1 carat per quart = 1.640344e-7 stones per teaspoon.
Real-world example
1,000 ct/qt × 1.640344e-7 = 0.0001640344 st/tsp
1,000 carats per quart = 0.0001640344 stones per teaspoon.
Conversion table
| Carat per Quart (ct/qt) | Stone per Teaspoon (st/tsp) |
|---|---|
| 0.1 ct/qt | 1.640344e-8 st/tsp |
| 1 ct/qt | 1.640344e-7 st/tsp |
| 10 ct/qt | 0.0000016403 st/tsp |
| 100 ct/qt | 0.0000164034 st/tsp |
| 1,000 ct/qt | 0.0001640344 st/tsp |
| 10,000 ct/qt | 0.0016403442 st/tsp |
Reverse conversion: Stone per Teaspoon to Carat per Quart
1.640344e-7 st/tsp × 6096281.453 = 0.9999998703 ct/qt
1.640344e-7 stones per teaspoon = 0.9999998703 carats per quart.
carats per quart = stones per teaspoon × 6096281.4528
For a page dedicated to this direction, see Stone per Teaspoon to Carat per Quart.
Understanding the Carat per Quart (ct/qt)
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 quart?
1 carat per quart equals 1.640344e-7 stones per teaspoon, using the exact defined conversion factor rather than an estimate.
How do I convert carat per quart to stone per teaspoon?
Multiply the carat per quart value by 1.640344e-7. The converter above does this instantly to whatever precision you set.
How do I convert stone per teaspoon back to carat per quart?
Use the reverse factor: 1 stone per teaspoon equals 6,096,281.453 carats per quart. You can also use the swap control in the converter above to flip the direction instantly.
What is a carat per quart?
Carat per Quart (ct/qt) 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 quart to stone per teaspoon conversion exact?
Yes. Both carat per quart and stone per teaspoon are defined by fixed standards rather than physical artifacts, so the factor of 1.640344e-7 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.