Work out carat to gram instantly with clear inputs, formula shown and shareable results.
Converting Carats to Grams is a single multiplication: one ct equals 0.2 g, so the amount is multiplied by that factor. Switching the direction divides by the same factor instead. This factor is an exact definition, not a rounded approximation, so the conversion is precise at any scale. The metric carat is defined as exactly 200 mg. This is gemstone weight, not gold purity — karat with a K is a different measure.
Carats → Grams
g = ct × 0.2
Grams → Carats
ct = g ÷ 0.2
One ct is 0.2 g. That figure is exact by definition.
Divide by 0.2 instead of multiplying — or just switch the direction selector, which does it for you.