Mass per volume density.
Stones per Quart to Kilograms per Cup Converter — st/qt to kg/cup
Convert Stone per Quart (st/qt) to Kilogram per Cup (kg/cup) using the exact conversion factor (1 stone per quart = 1.587573295 kilogram per cup). See the formula, worked examples, and conversion table.
Stones per Quart to Kilograms 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 / 4226.752838.
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 Kilograms per Cup
Stone per Quart and Kilogram 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
kilograms per cup = stones per quart × 1.587573295
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 kilogram per cup equals 4226.75283773 base units, so dividing one by the other gives the direct stone per quart-to-kilogram per cup factor of 1.587573295.
Simple example
1 st/qt × 1.587573295 = 1.587573295 kg/cup
1 stone per quart = 1.587573295 kilograms per cup.
Real-world example
1,000 st/qt × 1.587573295 = 1,587.573295 kg/cup
1,000 stones per quart = 1,587.573295 kilograms per cup.
Conversion table
| Stone per Quart (st/qt) | Kilogram per Cup (kg/cup) |
|---|---|
| 0.1 st/qt | 0.1587573295 kg/cup |
| 1 st/qt | 1.587573295 kg/cup |
| 10 st/qt | 15.87573295 kg/cup |
| 100 st/qt | 158.7573295 kg/cup |
| 1,000 st/qt | 1,587.573295 kg/cup |
| 10,000 st/qt | 15,875.73295 kg/cup |
Reverse conversion: Kilogram per Cup to Stone per Quart
1.587573295 kg/cup × 0.6298921777 = 1 st/qt
1.587573295 kilograms per cup = 1 stones per quart.
stones per quart = kilograms per cup × 0.629892177671
For a page dedicated to this direction, see Kilogram per Cup to Stone per Quart.
Understanding the Stone per Quart (st/qt)
Mass per volume density.
Understanding the Kilogram per Cup (kg/cup)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many kilograms per cup are in 1 stone per quart?
1 stone per quart equals 1.587573295 kilograms per cup, using the exact defined conversion factor rather than an estimate.
How do I convert stone per quart to kilogram per cup?
Multiply the stone per quart value by 1.587573295. The converter above does this instantly to whatever precision you set.
How do I convert kilogram per cup back to stone per quart?
Use the reverse factor: 1 kilogram per cup equals 0.6298921777 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 kilogram per cup?
Kilogram per Cup (kg/cup) is a unit of density.
Is the stone per quart to kilogram per cup conversion exact?
Yes. Both stone per quart and kilogram per cup are defined by fixed standards rather than physical artifacts, so the factor of 1.587573295 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.