Mass per volume density.
Carats per Cup to Stones per Quart Converter — ct/cup to st/qt
Convert Carat per Cup (ct/cup) to Stone per Quart (st/qt) using the exact conversion factor (1 carat per cup = 0.0001259784 stone per quart). See the formula, worked examples, and conversion table.
Carats per Cup to Stones per Quart 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 0.8453505675 / 6710.27993.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Carats per Cup to Stones per Quart
Carat per Cup and Stone per Quart 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 quart = carats per cup × 0.000125978435534
This factor comes from each unit's defined relationship to the category's base unit: 1 carat per cup equals 0.845350567546 base units, and 1 stone per quart equals 6710.27992975 base units, so dividing one by the other gives the direct carat per cup-to-stone per quart factor of 0.000125978435534.
Simple example
1 ct/cup × 0.0001259784355 = 0.0001259784 st/qt
1 carat per cup = 0.0001259784 stones per quart.
Real-world example
1,000 ct/cup × 0.0001259784355 = 0.1259784355 st/qt
1,000 carats per cup = 0.1259784355 stones per quart.
Conversion table
| Carat per Cup (ct/cup) | Stone per Quart (st/qt) |
|---|---|
| 0.1 ct/cup | 0.0000125978 st/qt |
| 1 ct/cup | 0.0001259784 st/qt |
| 10 ct/cup | 0.0012597844 st/qt |
| 100 ct/cup | 0.0125978436 st/qt |
| 1,000 ct/cup | 0.1259784355 st/qt |
| 10,000 ct/cup | 1.259784355 st/qt |
Reverse conversion: Stone per Quart to Carat per Cup
0.0001259784 st/qt × 7937.866475 = 0.9999997179 ct/cup
0.0001259784 stones per quart = 0.9999997179 carats per cup.
carats per cup = stones per quart × 7937.866475
For a page dedicated to this direction, see Stone per Quart to Carat per Cup.
Understanding the Carat per Cup (ct/cup)
Mass per volume density.
Understanding the Stone per Quart (st/qt)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many stones per quart are in 1 carat per cup?
1 carat per cup equals 0.0001259784 stones per quart, using the exact defined conversion factor rather than an estimate.
How do I convert carat per cup to stone per quart?
Multiply the carat per cup value by 0.0001259784355. The converter above does this instantly to whatever precision you set.
How do I convert stone per quart back to carat per cup?
Use the reverse factor: 1 stone per quart equals 7,937.866475 carats per cup. You can also use the swap control in the converter above to flip the direction instantly.
What is a carat per cup?
Carat per Cup (ct/cup) is a unit of density.
What is a stone per quart?
Stone per Quart (st/qt) is a unit of density.
Is the carat per cup to stone per quart conversion exact?
Yes. Both carat per cup and stone per quart are defined by fixed standards rather than physical artifacts, so the factor of 0.0001259784355 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.