Milligrams to Carats Converter
Convert milligrams (mg) to carats (ct), with the formula, a conversion table and exact factors.
Change the values and press Calculate to work out your own figures.
Enter a weight, choose its unit and the unit you want. The answer is exact until it is shown, and the same value appears in every other unit.
Show the working
- 1 mg = 0.005 ct
- 1 × 0.005 = 0.005 ct
How to convert milligrams to carats
1 mg = 0.005 ct, so multiply by 0.005 to go from milligrams to carats. Going the other way, 1 ct = 200 mg.
ct = mg × 0.005 mg = ct × 200
Worked example:
1 mg = 0.005 ct 5 × 0.005 = 0.025 ct
Milligrams to carats table
| Milligrams | Carats |
|---|---|
| 1 mg | 0.005 ct |
| 2 mg | 0.01 ct |
| 3 mg | 0.015 ct |
| 4 mg | 0.02 ct |
| 5 mg | 0.025 ct |
| 6 mg | 0.03 ct |
| 7 mg | 0.035 ct |
| 8 mg | 0.04 ct |
| 9 mg | 0.045 ct |
| 10 mg | 0.05 ct |
| 15 mg | 0.075 ct |
| 20 mg | 0.1 ct |
| 25 mg | 0.125 ct |
| 30 mg | 0.15 ct |
| 40 mg | 0.2 ct |
| 50 mg | 0.25 ct |
| 75 mg | 0.375 ct |
| 100 mg | 0.5 ct |
| 250 mg | 1.25 ct |
| 500 mg | 2.5 ct |
| 1000 mg | 5 ct |
About the units
- Milligrams (mg)
- Milligrams, a metric unit. Definition: BIPM SI Brochure.
- Carats (ct)
- Carats, a specialised unit. Metric carat, 200 mg exactly. Definition: NIST Handbook 44 (2024), Appendix C: General Tables of Units of Measurement.
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