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Convert grain to carat

Here you can quickly calculate how many carat fit in one grain.
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- scroll: formula · table · questions -

  • 1 gr = 0.323995 ct
  • 1 ct = 3.086472 gr

Example: grain to carat

  • 1 grain = 0.323995 carat

Grain to carat conversion table

grain carat
1 0.323995
2 0.647989
5 1.619973
10 3.239945
20 6.479891
50 16.199727
100 32.399455

Grain to carat formula

To convert grain to carat, multiply by 0.323995.

1 gr = 0.323995 ct
Example: 1 grain = 0.323995 carat

Common mass conversion mistakes

  • 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.

Quick grain and carat conversion quiz

Score: 0

8.1 grain equals 2.36 carat.

Correct answer: 8.1 grain = 2.62 carat.

2.3 carat equals 7.1 grain.

Correct answer: 2.3 carat = 7.1 grain.

10.4 grain equals 3.37 carat.

Correct answer: 10.4 grain = 3.37 carat.

16.4 carat equals 50.6 grain.

Correct answer: 16.4 carat = 50.6 grain.

More mass conversions