Convert Carats to Milligrams

Convert carats to milligrams instantly. Type a value below, check the formula and table, then see how the same ct to mg conversion looks as a single line in Notes Calculator.

ct 20,000 mg

Carats to Milligrams formula

One carat is 200 milligrams, so mg = ct × 200. For the reverse, multiply milligrams by 0.005, or use the Milligrams to Carats converter.

Carats to Milligrams conversion table

Carats (ct)Milligrams (mg)
1200
2400
51,000
102,000
204,000
255,000
5010,000
10020,000
25050,000
500100,000
1,000200,000

Carats to Milligrams in Notes Calculator

Notes Calculator is a notepad that does math. Write 100 carats to mg on any line and the answer appears beside it. Change the number and the result follows. The same works with in and as, and with values stored in variables, so a whole estimate can mix carats and milligrams without a separate converter.

Carats to Milligrams
NoteResult
100 carats to mg 20,000 mg
100 carats in mg 20,000 mg
10 mg as carats 0.05 ct
Results shown exactly as the app prints them with the default two-decimal setting.

See the unit conversion docs for mixing units in one expression, or open the free web app and try it.

FAQ

Frequently asked questions

How many milligrams are in one carat?
One carat equals 200 milligrams. To convert carats to milligrams, multiply by 200; to go back, multiply by 0.005.
How do I convert carats to milligrams in Notes Calculator?
Type the value, the unit, and the target unit on one line: 100 carats to mg. The keywords to, in, and as all work, and the result updates as you type. You can also keep the value in a variable and convert it later.
Is this carats to milligrams converter free?
Yes. The converter on this page is free, and Notes Calculator has a free plan for the web, Mac, Windows, Linux, and Android with the same unit conversions built in.

Convert carats to milligrams without leaving your notes.

Notes Calculator is free to start and runs in your browser. Units, currencies, percentages, and variables in one plain-text notepad.

Free forever plan · No credit card · Cross-platform