Mass per volume density.
Stones per Quart to Carats per Cup Converter — st/qt to ct/cup
Convert Stone per Quart (st/qt) to Carat per Cup (ct/cup) using the exact conversion factor (1 stone per quart = 7,937.866475 carat per cup). See the formula, worked examples, and conversion table.
Stones per Quart to Carats per Cup 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 6710.27993 / 0.8453505675.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Stones per Quart to Carats per Cup
Stone per Quart and Carat per Cup 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 cup = stones per quart × 7937.866475
This factor comes from each unit's defined relationship to the category's base unit: 1 stone per quart equals 6710.27992975 base units, and 1 carat per cup equals 0.845350567546 base units, so dividing one by the other gives the direct stone per quart-to-carat per cup factor of 7937.866475.
Simple example
1 st/qt × 7937.866475 = 7,937.866475 ct/cup
1 stone per quart = 7,937.866475 carats per cup.
Real-world example
1,000 st/qt × 7937.866475 = 7,937,866.475 ct/cup
1,000 stones per quart = 7,937,866.475 carats per cup.
Conversion table
| Stone per Quart (st/qt) | Carat per Cup (ct/cup) |
|---|---|
| 0.1 st/qt | 793.7866475 ct/cup |
| 1 st/qt | 7,937.866475 ct/cup |
| 10 st/qt | 79,378.66475 ct/cup |
| 100 st/qt | 793,786.6475 ct/cup |
| 1,000 st/qt | 7,937,866.475 ct/cup |
| 10,000 st/qt | 79,378,664.75 ct/cup |
Reverse conversion: Carat per Cup to Stone per Quart
1 ct/cup × 0.0001259784355 = 0.0001259784 st/qt
1 carat per cup = 0.0001259784 stones per quart.
stones per quart = carats per cup × 0.000125978435534
For a page dedicated to this direction, see Carat per Cup to Stone per Quart.
Understanding the Stone per Quart (st/qt)
Mass per volume density.
Understanding the Carat per Cup (ct/cup)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many carats per cup are in 1 stone per quart?
1 stone per quart equals 7,937.866475 carats per cup, using the exact defined conversion factor rather than an estimate.
How do I convert stone per quart to carat per cup?
Multiply the stone per quart value by 7937.866475. The converter above does this instantly to whatever precision you set.
How do I convert carat per cup back to stone per quart?
Use the reverse factor: 1 carat per cup equals 0.0001259784 stones per quart. You can also use the swap control in the converter above to flip the direction instantly.
What is a stone per quart?
Stone per Quart (st/qt) is a unit of density.
What is a carat per cup?
Carat per Cup (ct/cup) is a unit of density.
Is the stone per quart to carat per cup conversion exact?
Yes. Both stone per quart and carat per cup are defined by fixed standards rather than physical artifacts, so the factor of 7937.866475 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.