A metric carat is exactly 200 milligrams.
Carats to Milligrams
Convert carats (ct) to milligrams (mg) instantly. Free online weight converter with formulas, tables and examples.
Reserved for a responsive leaderboard above the conversion details.
Professional calculator style
World-scale conversion engine
30+ categories
6,500+ units
Instant results
Offline ready
Converter
Length Converter
Convert metric, imperial, and nautical distance units.
Context values
Some unit families need one extra value for a physically accurate result.
Milligram is 0.001 gram units.
mg = ct × 200
Results update instantly for Carats to Milligrams conversions.
Reserved above the conversion cards and below the converter.
Formula
mg = ct × 200
ct = mg ÷ 200
Conversion table
| 1 ct | 200.000000 mg |
| 5 ct | 1000.000000 mg |
| 10 ct | 2000.000000 mg |
| 20 ct | 4000.000000 mg |
| 50 ct | 10000.000000 mg |
| 100 ct | 20000.000000 mg |
| 500 ct | 100000.000000 mg |
| 1000 ct | 200000.000000 mg |
Related conversions
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
What is the source unit in this conversion?
The source unit is the carat (ct). A metric carat is exactly 200 milligrams.
What is the destination unit in this conversion?
The destination unit is the milligram (mg). Milligram is 0.001 gram units.
How do I convert carats to milligrams?
Multiply the number of carats by 200 to get the equivalent value in milligrams. For example, 5 ct × 200 = 1000.000000 mg.
Is the carat to milligram conversion exact?
Yes. This converter uses a fixed factor of 200, so results are precise and consistent every time you use it.
Where is this conversion commonly used?
It's used in everyday measurement, shipping and logistics, scientific and industrial work, and any context where you need to switch between carat and milligram values.
Can I convert milligrams back to carats?
Yes. Multiply the milligrams value by 0.005, or divide it by 200, to convert back to carats.
Reserved between the FAQ and the article so the page stays balanced.
About this conversion
This page converts carats (ct) into milligrams (mg) using the Universal Converter's mass conversion engine.
Carat-to-Milligram conversions are useful for everyday calculations, scientific work, shipping, and any task that mixes different weight or mass units.
The formula is mg = ct × 200, based on the standard definitions of carat and milligram.
Because the conversion factor is fixed, results stay consistent and repeatable no matter how many times you calculate them.
Carat: A metric carat is exactly 200 milligrams. Milligram: Milligram is 0.001 gram units.