Mass per volume density.
Stones per Quart to Megagrams per Cup Converter — st/qt to Mg/cup
Convert Stone per Quart (st/qt) to Megagram per Cup (Mg/cup) using the exact conversion factor (1 stone per quart = 0.0015875733 megagram per cup). See the formula, worked examples, and conversion table.
Stones per Quart to Megagrams 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 / 4.22675284e+6.
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 Megagrams per Cup
Stone per Quart and Megagram 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
megagrams per cup = stones per quart × 0.001587573295
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 megagram per cup equals 4226752.83773 base units, so dividing one by the other gives the direct stone per quart-to-megagram per cup factor of 0.001587573295.
Simple example
1 st/qt × 0.001587573295 = 0.0015875733 Mg/cup
1 stone per quart = 0.0015875733 megagrams per cup.
Real-world example
1,000 st/qt × 0.001587573295 = 1.587573295 Mg/cup
1,000 stones per quart = 1.587573295 megagrams per cup.
Conversion table
| Stone per Quart (st/qt) | Megagram per Cup (Mg/cup) |
|---|---|
| 0.1 st/qt | 0.0001587573 Mg/cup |
| 1 st/qt | 0.0015875733 Mg/cup |
| 10 st/qt | 0.015875733 Mg/cup |
| 100 st/qt | 0.1587573295 Mg/cup |
| 1,000 st/qt | 1.587573295 Mg/cup |
| 10,000 st/qt | 15.87573295 Mg/cup |
Reverse conversion: Megagram per Cup to Stone per Quart
0.0015875733 Mg/cup × 629.8921777 = 1.000000003 st/qt
0.0015875733 megagrams per cup = 1.000000003 stones per quart.
stones per quart = megagrams per cup × 629.892177671
For a page dedicated to this direction, see Megagram per Cup to Stone per Quart.
Understanding the Stone per Quart (st/qt)
Mass per volume density.
Understanding the Megagram per Cup (Mg/cup)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many megagrams per cup are in 1 stone per quart?
1 stone per quart equals 0.0015875733 megagrams per cup, using the exact defined conversion factor rather than an estimate.
How do I convert stone per quart to megagram per cup?
Multiply the stone per quart value by 0.001587573295. The converter above does this instantly to whatever precision you set.
How do I convert megagram per cup back to stone per quart?
Use the reverse factor: 1 megagram per cup equals 629.8921777 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 megagram per cup?
Megagram per Cup (Mg/cup) is a unit of density.
Is the stone per quart to megagram per cup conversion exact?
Yes. Both stone per quart and megagram per cup are defined by fixed standards rather than physical artifacts, so the factor of 0.001587573295 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.