Carat (ct)
The carat is a jewelry mass unit for diamonds, gemstones, and pearls.
History: the carat became a jewelry and gemstone unit and is now exactly 200 milligrams.
Quickly convert carats to stones without lookup tables or manual math.
This page is focused on converting carats to stones. Type a number into the first field and the result appears immediately in the second field.
Example: 1 ct = 0.0000314946 st. Conversion formula: result = value × 0.0002 / 6.35029318.
Use this converter for everyday calculations, study notes, engineering checks, and quick value verification without installing a separate app.
The carat is a jewelry mass unit for diamonds, gemstones, and pearls.
History: the carat became a jewelry and gemstone unit and is now exactly 200 milligrams.
The stone is used in the United Kingdom and Ireland mainly for human body weight.
History: the stone was an English trade weight with varying values, but body weight usage settled on 14 pounds.
Enter a value in the Carat field. The converter applies the formula "result = value × 0.0002 / 6.35029318" and immediately shows the result in stones.
1 ct = 0.0000314946 st.
Yes. Use the swap button or choose the reverse pair from the full conversion list.