Convert grain to carat

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

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Conversion from grain to carat example

Starting value Increment Accuracy

To convert grain to carat, multiply by 0.323995.

1 gr = 0.323995 ct

Example: 1 grain = 0.323995 carat

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

183 carat equals 508 grain.

Correct answer: 183 carat = 565 grain.

1.7 carat equals 6.03 grain.

Correct answer: 1.7 carat = 5.25 grain.

210 carat equals 648 grain.

Correct answer: 210 carat = 648 grain.