Mass per volume density.
Carats per Cup to Stones per Gallon Converter — ct/cup to st/gal
Convert Carat per Cup (ct/cup) to Stone per Gallon (st/gal) using the exact conversion factor (1 carat per cup = 0.0005039137 stone per gallon). See the formula, worked examples, and conversion table.
Carats per Cup to Stones 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 0.8453505675 / 1677.569982.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Carats per Cup to Stones per Gallon
Carat per Cup and Stone 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
stones per gallon = carats per cup × 0.000503913742137
This factor comes from each unit's defined relationship to the category's base unit: 1 carat per cup equals 0.845350567546 base units, and 1 stone per gallon equals 1677.56998244 base units, so dividing one by the other gives the direct carat per cup-to-stone per gallon factor of 0.000503913742137.
Simple example
1 ct/cup × 0.0005039137421 = 0.0005039137 st/gal
1 carat per cup = 0.0005039137 stones per gallon.
Real-world example
1,000 ct/cup × 0.0005039137421 = 0.5039137421 st/gal
1,000 carats per cup = 0.5039137421 stones per gallon.
Conversion table
| Carat per Cup (ct/cup) | Stone per Gallon (st/gal) |
|---|---|
| 0.1 ct/cup | 0.0000503914 st/gal |
| 1 ct/cup | 0.0005039137 st/gal |
| 10 ct/cup | 0.0050391374 st/gal |
| 100 ct/cup | 0.0503913742 st/gal |
| 1,000 ct/cup | 0.5039137421 st/gal |
| 10,000 ct/cup | 5.039137421 st/gal |
Reverse conversion: Stone per Gallon to Carat per Cup
0.0005039137 st/gal × 1984.466619 = 0.9999999164 ct/cup
0.0005039137 stones per gallon = 0.9999999164 carats per cup.
carats per cup = stones per gallon × 1984.46661875
For a page dedicated to this direction, see Stone per Gallon to Carat per Cup.
Understanding the Carat per Cup (ct/cup)
Mass per volume density.
Understanding the Stone per Gallon (st/gal)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many stones per gallon are in 1 carat per cup?
1 carat per cup equals 0.0005039137 stones per gallon, using the exact defined conversion factor rather than an estimate.
How do I convert carat per cup to stone per gallon?
Multiply the carat per cup value by 0.0005039137421. The converter above does this instantly to whatever precision you set.
How do I convert stone per gallon back to carat per cup?
Use the reverse factor: 1 stone per gallon equals 1,984.466619 carats per cup. You can also use the swap control in the converter above to flip the direction instantly.
What is a carat per cup?
Carat per Cup (ct/cup) is a unit of density.
What is a stone per gallon?
Stone per Gallon (st/gal) is a unit of density.
Is the carat per cup to stone per gallon conversion exact?
Yes. Both carat per cup and stone per gallon are defined by fixed standards rather than physical artifacts, so the factor of 0.0005039137421 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.