Convert carats to milligrams
1 ct = 200 mg. Change the amount below, or read the formula and the reference table further down.
1 carat equals
milligrams
1 ct = 200 mg
The formula
Carats and milligrams both measure weight & mass from the same zero, so a single multiplier does the job.
mg = ct × 200
Going the other way? Convert milligrams to carats.
Carats to milligrams table
Common values, rounded for reading.
| Carats (ct) | Milligrams (mg) |
|---|---|
| 1 | 200 |
| 2 | 400 |
| 3 | 600 |
| 4 | 800 |
| 5 | 1,000 |
| 6 | 1,200 |
| 7 | 1,400 |
| 8 | 1,600 |
| 9 | 1,800 |
| 10 | 2,000 |
| 15 | 3,000 |
| 20 | 4,000 |
| 25 | 5,000 |
| 30 | 6,000 |
| 40 | 8,000 |
| 50 | 10,000 |
| 75 | 15,000 |
| 100 | 20,000 |
| 250 | 50,000 |
| 500 | 100,000 |
| 1,000 | 200,000 |
Questions people ask
- How many milligrams are in a carat?
- One carat equals 200 milligrams.
- How do I convert carats to milligrams by hand?
- Multiply the number of carats by 200. For a rough check, 200 is close enough for most everyday use.
- What is 1 carat in milligrams?
- 1 carat is 200 milligrams.
Calcuit generates this page from a unit table, so the factors here match every other page on the site.