1 carat 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
Values either side of 1 ct.
| Carats (ct) | Milligrams (mg) |
|---|---|
| -4 | -800 |
| -3.5 | -700 |
| -3 | -600 |
| -2.5 | -500 |
| -2 | -400 |
| -1.5 | -300 |
| -1 | -200 |
| -0.5 | -100 |
| 0 | 0 |
| 0.5 | 100 |
| 1 | 200 |
| 1.5 | 300 |
| 2 | 400 |
| 2.5 | 500 |
| 3 | 600 |
| 3.5 | 700 |
| 4 | 800 |
| 4.5 | 900 |
| 5 | 1,000 |
| 5.5 | 1,100 |
| 6 | 1,200 |
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.