Mass per volume density.
Stones per Cup to Megagrams per Gallon Converter — st/cup to Mg/gal
Convert Stone per Cup (st/cup) to Megagram per Gallon (Mg/gal) using the exact conversion factor (1 stone per cup = 0.1016046909 megagram per gallon). See the formula, worked examples, and conversion table.
Stones per Cup to Megagrams per Gallon 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 26841.11972 / 264172.0524.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Stones per Cup to Megagrams per Gallon
Stone per Cup and Megagram per Gallon 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 gallon = stones per cup × 0.10160469088
This factor comes from each unit's defined relationship to the category's base unit: 1 stone per cup equals 26841.119719 base units, and 1 megagram per gallon equals 264172.052358 base units, so dividing one by the other gives the direct stone per cup-to-megagram per gallon factor of 0.10160469088.
Simple example
1 st/cup × 0.1016046909 = 0.1016046909 Mg/gal
1 stone per cup = 0.1016046909 megagrams per gallon.
Real-world example
1,000 st/cup × 0.1016046909 = 101.6046909 Mg/gal
1,000 stones per cup = 101.6046909 megagrams per gallon.
Conversion table
| Stone per Cup (st/cup) | Megagram per Gallon (Mg/gal) |
|---|---|
| 0.1 st/cup | 0.0101604691 Mg/gal |
| 1 st/cup | 0.1016046909 Mg/gal |
| 10 st/cup | 1.016046909 Mg/gal |
| 100 st/cup | 10.16046909 Mg/gal |
| 1,000 st/cup | 101.6046909 Mg/gal |
| 10,000 st/cup | 1,016.046909 Mg/gal |
Reverse conversion: Megagram per Gallon to Stone per Cup
0.1016046909 Mg/gal × 9.842065276 = 1 st/cup
0.1016046909 megagrams per gallon = 1 stones per cup.
stones per cup = megagrams per gallon × 9.84206527611
For a page dedicated to this direction, see Megagram per Gallon to Stone per Cup.
Understanding the Stone per Cup (st/cup)
Mass per volume density.
Understanding the Megagram per Gallon (Mg/gal)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many megagrams per gallon are in 1 stone per cup?
1 stone per cup equals 0.1016046909 megagrams per gallon, using the exact defined conversion factor rather than an estimate.
How do I convert stone per cup to megagram per gallon?
Multiply the stone per cup value by 0.1016046909. The converter above does this instantly to whatever precision you set.
How do I convert megagram per gallon back to stone per cup?
Use the reverse factor: 1 megagram per gallon equals 9.842065276 stones per cup. You can also use the swap control in the converter above to flip the direction instantly.
What is a stone per cup?
Stone per Cup (st/cup) is a unit of density.
What is a megagram per gallon?
Megagram per Gallon (Mg/gal) is a unit of density.
Is the stone per cup to megagram per gallon conversion exact?
Yes. Both stone per cup and megagram per gallon are defined by fixed standards rather than physical artifacts, so the factor of 0.1016046909 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.