Mass per volume density.
Stones per Gallon to Grams per Cup Converter — st/gal to g/cup
Convert Stone per Gallon (st/gal) to Gram per Cup (g/cup) using the exact conversion factor (1 stone per gallon = 396.8933238 gram per cup). See the formula, worked examples, and conversion table.
Stones per Gallon to Grams 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 1677.569982 / 4.226752838.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Stones per Gallon to Grams per Cup
Stone per Gallon and Gram 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
grams per cup = stones per gallon × 396.89332375
This factor comes from each unit's defined relationship to the category's base unit: 1 stone per gallon equals 1677.56998244 base units, and 1 gram per cup equals 4.22675283773 base units, so dividing one by the other gives the direct stone per gallon-to-gram per cup factor of 396.89332375.
Simple example
1 st/gal × 396.8933238 = 396.8933238 g/cup
1 stone per gallon = 396.8933238 grams per cup.
Real-world example
1,000 st/gal × 396.8933238 = 396,893.3238 g/cup
1,000 stones per gallon = 396,893.3238 grams per cup.
Conversion table
| Stone per Gallon (st/gal) | Gram per Cup (g/cup) |
|---|---|
| 0.1 st/gal | 39.68933238 g/cup |
| 1 st/gal | 396.8933238 g/cup |
| 10 st/gal | 3,968.933238 g/cup |
| 100 st/gal | 39,689.33238 g/cup |
| 1,000 st/gal | 396,893.3238 g/cup |
| 10,000 st/gal | 3,968,933.238 g/cup |
Reverse conversion: Gram per Cup to Stone per Gallon
396.8933238 g/cup × 0.002519568711 = 1 st/gal
396.8933238 grams per cup = 1 stones per gallon.
stones per gallon = grams per cup × 0.00251956871068
For a page dedicated to this direction, see Gram per Cup to Stone per Gallon.
Understanding the Stone per Gallon (st/gal)
Mass per volume density.
Understanding the Gram per Cup (g/cup)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many grams per cup are in 1 stone per gallon?
1 stone per gallon equals 396.8933238 grams per cup, using the exact defined conversion factor rather than an estimate.
How do I convert stone per gallon to gram per cup?
Multiply the stone per gallon value by 396.8933238. The converter above does this instantly to whatever precision you set.
How do I convert gram per cup back to stone per gallon?
Use the reverse factor: 1 gram per cup equals 0.0025195687 stones per gallon. You can also use the swap control in the converter above to flip the direction instantly.
What is a stone per gallon?
Stone per Gallon (st/gal) is a unit of density.
What is a gram per cup?
Gram per Cup (g/cup) is a unit of density.
Is the stone per gallon to gram per cup conversion exact?
Yes. Both stone per gallon and gram per cup are defined by fixed standards rather than physical artifacts, so the factor of 396.8933238 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.