Mass per volume density.
Carats per Cup to Stones per Pint Converter — ct/cup to st/pt
Convert Carat per Cup (ct/cup) to Stone per Pint (st/pt) using the exact conversion factor (1 carat per cup = 0.0000629892 stone per pint). See the formula, worked examples, and conversion table.
Carats per Cup to Stones per Pint 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 / 13420.55986.
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 Pint
Carat per Cup and Stone per Pint 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 pint = carats per cup × 0.0000629892177671
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 pint equals 13420.5598595 base units, so dividing one by the other gives the direct carat per cup-to-stone per pint factor of 0.0000629892177671.
Simple example
1 ct/cup × 0.00006298921777 = 0.0000629892 st/pt
1 carat per cup = 0.0000629892 stones per pint.
Real-world example
1,000 ct/cup × 0.00006298921777 = 0.0629892178 st/pt
1,000 carats per cup = 0.0629892178 stones per pint.
Conversion table
| Carat per Cup (ct/cup) | Stone per Pint (st/pt) |
|---|---|
| 0.1 ct/cup | 0.0000062989 st/pt |
| 1 ct/cup | 0.0000629892 st/pt |
| 10 ct/cup | 0.0006298922 st/pt |
| 100 ct/cup | 0.0062989218 st/pt |
| 1,000 ct/cup | 0.0629892178 st/pt |
| 10,000 ct/cup | 0.6298921777 st/pt |
Reverse conversion: Stone per Pint to Carat per Cup
0.0000629892 st/pt × 15875.73295 = 0.9999997179 ct/cup
0.0000629892 stones per pint = 0.9999997179 carats per cup.
carats per cup = stones per pint × 15875.73295
For a page dedicated to this direction, see Stone per Pint to Carat per Cup.
Understanding the Carat per Cup (ct/cup)
Mass per volume density.
Understanding the Stone per Pint (st/pt)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many stones per pint are in 1 carat per cup?
1 carat per cup equals 0.0000629892 stones per pint, using the exact defined conversion factor rather than an estimate.
How do I convert carat per cup to stone per pint?
Multiply the carat per cup value by 0.00006298921777. The converter above does this instantly to whatever precision you set.
How do I convert stone per pint back to carat per cup?
Use the reverse factor: 1 stone per pint equals 15,875.73295 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 pint?
Stone per Pint (st/pt) is a unit of density.
Is the carat per cup to stone per pint conversion exact?
Yes. Both carat per cup and stone per pint are defined by fixed standards rather than physical artifacts, so the factor of 0.00006298921777 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.