Mass per volume density.
Carats per Imperial gallon to Stones per Cup Converter — ct/imp gal to st/cup
Convert Carat per Imperial gallon (ct/imp gal) to Stone per Cup (st/cup) using the exact conversion factor (1 carat per imperial gallon = 0.000001639 stone per cup). See the formula, worked examples, and conversion table.
Carats per Imperial gallon to Stones 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 0.04399384966 / 26841.11972.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Carats per Imperial gallon to Stones per Cup
Carat per Imperial gallon and Stone 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
stones per cup = carats per imperial gallon × 0.00000163904673577
This factor comes from each unit's defined relationship to the category's base unit: 1 carat per imperial gallon equals 0.0439938496598 base units, and 1 stone per cup equals 26841.119719 base units, so dividing one by the other gives the direct carat per imperial gallon-to-stone per cup factor of 0.00000163904673577.
Simple example
1 ct/imp gal × 0.000001639046736 = 0.000001639 st/cup
1 carat per imperial gallon = 0.000001639 stones per cup.
Real-world example
1,000 ct/imp gal × 0.000001639046736 = 0.0016390467 st/cup
1,000 carats per imperial gallon = 0.0016390467 stones per cup.
Conversion table
| Carat per Imperial gallon (ct/imp gal) | Stone per Cup (st/cup) |
|---|---|
| 0.1 ct/imp gal | 1.639047e-7 st/cup |
| 1 ct/imp gal | 0.000001639 st/cup |
| 10 ct/imp gal | 0.0000163905 st/cup |
| 100 ct/imp gal | 0.0001639047 st/cup |
| 1,000 ct/imp gal | 0.0016390467 st/cup |
| 10,000 ct/imp gal | 0.0163904674 st/cup |
Reverse conversion: Stone per Cup to Carat per Imperial gallon
0.000001639 st/cup × 610110.7297 = 0.999971486 ct/imp gal
0.000001639 stones per cup = 0.999971486 carats per imperial gallon.
carats per imperial gallon = stones per cup × 610110.729716
For a page dedicated to this direction, see Stone per Cup to Carat per Imperial gallon.
Understanding the Carat per Imperial gallon (ct/imp gal)
Mass per volume density.
Understanding the Stone per Cup (st/cup)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many stones per cup are in 1 carat per imperial gallon?
1 carat per imperial gallon equals 0.000001639 stones per cup, using the exact defined conversion factor rather than an estimate.
How do I convert carat per imperial gallon to stone per cup?
Multiply the carat per imperial gallon value by 0.000001639046736. The converter above does this instantly to whatever precision you set.
How do I convert stone per cup back to carat per imperial gallon?
Use the reverse factor: 1 stone per cup equals 610,110.7297 carats per imperial gallon. You can also use the swap control in the converter above to flip the direction instantly.
What is a carat per imperial gallon?
Carat per Imperial gallon (ct/imp gal) is a unit of density.
What is a stone per cup?
Stone per Cup (st/cup) is a unit of density.
Is the carat per imperial gallon to stone per cup conversion exact?
Yes. Both carat per imperial gallon and stone per cup are defined by fixed standards rather than physical artifacts, so the factor of 0.000001639046736 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.