Mass per volume density.
Stones per Cup to Megagrams per Imperial gallon Converter — st/cup to Mg/imp gal
Convert Stone per Cup (st/cup) to Megagram per Imperial gallon (Mg/imp gal) using the exact conversion factor (1 stone per cup = 0.1220221459 megagram per imperial gallon). See the formula, worked examples, and conversion table.
Stones per Cup to Megagrams per Imperial 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 / 219969.2483.
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 Imperial gallon
Stone per Cup and Megagram per Imperial 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 imperial gallon = stones per cup × 0.122022145943
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 imperial gallon equals 219969.248299 base units, so dividing one by the other gives the direct stone per cup-to-megagram per imperial gallon factor of 0.122022145943.
Simple example
1 st/cup × 0.1220221459 = 0.1220221459 Mg/imp gal
1 stone per cup = 0.1220221459 megagrams per imperial gallon.
Real-world example
1,000 st/cup × 0.1220221459 = 122.0221459 Mg/imp gal
1,000 stones per cup = 122.0221459 megagrams per imperial gallon.
Conversion table
| Stone per Cup (st/cup) | Megagram per Imperial gallon (Mg/imp gal) |
|---|---|
| 0.1 st/cup | 0.0122022146 Mg/imp gal |
| 1 st/cup | 0.1220221459 Mg/imp gal |
| 10 st/cup | 1.220221459 Mg/imp gal |
| 100 st/cup | 12.20221459 Mg/imp gal |
| 1,000 st/cup | 122.0221459 Mg/imp gal |
| 10,000 st/cup | 1,220.221459 Mg/imp gal |
Reverse conversion: Megagram per Imperial gallon to Stone per Cup
0.1220221459 Mg/imp gal × 8.195233679 = 0.9999999996 st/cup
0.1220221459 megagrams per imperial gallon = 0.9999999996 stones per cup.
stones per cup = megagrams per imperial gallon × 8.19523367885
For a page dedicated to this direction, see Megagram per Imperial gallon to Stone per Cup.
Understanding the Stone per Cup (st/cup)
Mass per volume density.
Understanding the Megagram per Imperial gallon (Mg/imp gal)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many megagrams per imperial gallon are in 1 stone per cup?
1 stone per cup equals 0.1220221459 megagrams per imperial gallon, using the exact defined conversion factor rather than an estimate.
How do I convert stone per cup to megagram per imperial gallon?
Multiply the stone per cup value by 0.1220221459. The converter above does this instantly to whatever precision you set.
How do I convert megagram per imperial gallon back to stone per cup?
Use the reverse factor: 1 megagram per imperial gallon equals 8.195233679 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 imperial gallon?
Megagram per Imperial gallon (Mg/imp gal) is a unit of density.
Is the stone per cup to megagram per imperial gallon conversion exact?
Yes. Both stone per cup and megagram per imperial gallon are defined by fixed standards rather than physical artifacts, so the factor of 0.1220221459 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.