Convert Milligram to Carat
Use this free converter to change milligrams (mg) into carats (ct). Milligram and carat both measure weight & mass. As a quick reference, 1 mg equals 0.005 ct, and 1 ct equals 200 mg.
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Carat (ct)
0.005
1 mg = 0.005 ct
Weight & Mass conversion table
| Milligram | Carat |
|---|---|
| 0.01 | 0.00005 |
| 0.1 | 0.0005 |
| 0.5 | 0.0025 |
| 1 | 0.005 |
| 2 | 0.01 |
| 3 | 0.015 |
| 5 | 0.025 |
| 10 | 0.05 |
| 20 | 0.1 |
| 25 | 0.125 |
| 50 | 0.25 |
| 100 | 0.5 |
| 1,000 | 5 |
How to convert Milligram to Carat
Multiply the milligram value by 0.005 to get carats.
- Enter the number of milligrams you want to convert.
- The converter instantly shows the equivalent value in carats.
- Worked example: 15 mg × 0.005 = 0.075 ct.
- Use the swap button to reverse the conversion (carat to milligram).
About these units
Milligram (mg)
- Definition
- A milligram (mg) is one thousandth of a gram, used for very small masses such as medication doses.
- History
- It is a standard metric subdivision using the prefix "milli-" (one thousandth).
- Current use
- Milligrams express drug dosages, vitamin content, and quantities in chemistry and pharmacology.
Carat (ct)
- Definition
- A carat (ct) is a unit of mass for gemstones equal to exactly 200 milligrams.
- History
- It takes its name from the carob seed, once used as a counterweight, and was standardised at 0.2 g in 1907.
- Current use
- Carats express the weight of diamonds and other precious stones in the jewellery trade.
Frequently asked questions
How many carats are in a milligram?
There are 0.005 ct in 1 mg. To convert, multiply the number of milligrams by 0.005.
How do I convert milligrams to carats?
Multiply the milligram value by 0.005 to get carats. For example, 10 mg = 0.05 ct.
Is this milligram-to-carat converter free?
Yes. This converter is completely free, runs entirely in your browser, and requires no sign-up. Your inputs never leave your device.
Convert Milligram to other weight & mass units
| Unit | 1 Milligram equals |
|---|---|
| Kilogram (kg) | 0.000001 kg |
| Gram (g) | 0.001 g |
| Microgram (µg) | 1000 µg |
| Metric Ton (t) | 1.0000e-9 t |
| Pound (lb) | 0.0000022046226 lb |
| Ounce (oz) | 0.000035273962 oz |
| Stone (st) | 1.5747e-7 st |
| US Ton (ton) | 1.1023e-9 ton |
| Imperial Ton (long ton) | 9.8421e-10 long ton |
| Carat (ct) | 0.005 ct |