Common Converters

Convert Carats to Stone

Use our accurate converter to change carats into stone. This tool is simple to use and works instantly.

How to Calculate

To change carats to stone, you just need to know the conversion factor.

Rule: 1 Carats = 0.0000314946 Stone

Carats to Stone
Pre-defined calculator for direct carats to stone conversion.
Carats (ct)
0
Stone (st)
Formula: 1 Carats = 0.00003149 Stone

Unit Information

About Carats

Definition: The carat (symbol: ct) is a unit of mass used for measuring gemstones and pearls, equal to 200 mg.

History: Derived from the seeds of the carob tree (Ceratonia siliqua), which were historically used as steady weight standards.

Where it is used: Globally used to express the weight of diamonds and precious stones.

Carats to Stone Conversion Table

Carats [ct]Stone [st]
0.01 ct0.0000003149 st
0.1 ct0.0000031495 st
1 ct0.0000314946 st
2 ct0.0000629892 st
3 ct0.0000944839 st
5 ct0.0001574731 st
10 ct0.0003149462 st
20 ct0.0006298925 st
50 ct0.0015747312 st
100 ct0.0031494625 st
1000 ct0.0314946247 st

How to Convert Carats to Stone

Calculation: To convert carats to stone, multiply the value by the conversion factor (0.0000314946).

Example: convert 15 ct to st:
15 ct = 15 × 0.0000314946 st = 0.0004724194 st

Carats to All Weight & Mass Units

Explore all available conversion pairs for carats to other professional weight & mass metrics.

All Unit Conversion Systems

Access our high-fidelity calculators for other measurement systems and engineering metrics.