Carats to Grams
Convert carats to grams and back. Diamonds are priced by carat, so this is how you picture the actual size.
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Common values
Formula
g = ct × 0.2
One carat is exactly 0.2 g. Gold purity is also called karat (K) but that is a completely different measure.
Frequently asked questions
QHow many g is 1 ct?
1 ct is 0.2 g, and 10 ct is 2 g. Type any value in the box above to convert instantly.
QAnd how many ct is 1 g?
1 g is 5 ct. This converter works both ways, so typing in the right box updates the left one.
QWhere is this unit used?
One carat is exactly 0.2 g. Gold purity is also called karat (K) but that is a completely different measure.
Other converters
Traditional units (geun, doe, majigi and so on) vary by region and product.