Convert carat to grain

Here you can quickly calculate how many grain fit in one carat.

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Example: carat to grain

Starting value Increment Accuracy

To convert carat to grain, multiply by 3.086472.

1 ct = 3.086472 gr

Example: 1 carat = 3.086472 grain

The carat used for gemstones is a unit of mass: exactly 0.2 g, so a 5-carat diamond weighs 1 gram. The karat used for gold is something else entirely, a purity scale where 24k is pure gold and 18k is 75% gold. The two cannot be converted into each other.

Score: 0

66 carat equals 224 grain.

Correct answer: 66 carat = 204 grain.

23.6 grain equals 7.65 carat.

Correct answer: 23.6 grain = 7.65 carat.

18.2 grain equals 6.49 carat.

Correct answer: 18.2 grain = 5.9 carat.

5.5 grain equals 1.51 carat.

Correct answer: 5.5 grain = 1.78 carat.