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Convert carat to milligram

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

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  • 1 ct = 200 mg
  • 1 mg = 0.005 ct

Carat to milligram conversion table

carat milligram
1 200
2 400
5 1000
10 2000
20 4000
50 10000
100 20000

Formula to convert carat to milligram

To convert carat to milligram, multiply by 200.

1 ct = 200 mg
Example: 1 carat = 200 milligram

Common mistakes in mass conversion

  • 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 carat to/from milligram conversion quiz

Score: 0

123 milligram equals 0.615 carat.

Correct answer: 123 milligram = 0.615 carat.

11 carat equals 1.1e+3 milligram.

Correct answer: 11 carat = 2.2e+3 milligram.

203 carat equals 4.06e+4 milligram.

Correct answer: 203 carat = 4.06e+4 milligram.

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