Convert Milligrams to Carats
Convert Milligrams to Carats instantly. 1 Milligram (mg) equals 0.005 Carats (ct).
Milligrams to Carats conversion table
| Milligrams (mg) | Carats (ct) |
|---|---|
| 1 mg | 0.005 ct |
| 2 mg | 0.01 ct |
| 3 mg | 0.015 ct |
| 5 mg | 0.025 ct |
| 10 mg | 0.05 ct |
| 20 mg | 0.1 ct |
| 50 mg | 0.25 ct |
| 100 mg | 0.5 ct |
| 500 mg | 2.5 ct |
| 1,000 mg | 5 ct |
1 Milligram = 0.005 Carats · multiply Milligrams by 0.005
About converting Milligrams to Carats
Milligrams (mg) and Carats (ct) are both units of weight & mass, so converting between them is a single multiplication: multiply your Milligrams figure by 0.005. Ten Milligrams comes to 0.05 Carats, and a hundred works out at 0.5 Carats.
Rule of thumb: going from Milligrams to Carats divides, so the figure always shrinks — it takes about 200 Milligrams to make a single Carat. If your answer came out bigger, you have the conversion the wrong way round.
What is a Milligram?
A milligram is one thousandth of a gram, and it marks the point where measurement stops being about objects and starts being about doses and traces. Nutrition labels give sodium, cholesterol and most vitamins in milligrams; pharmacies dispense tablets by them; environmental limits on lead or arsenic are written in milligrams per litre. Milligrams sit well below the resolution of any kitchen or shop scale — reading them takes a laboratory balance — which is why the unit belongs to pharmacists, chemists and regulators rather than to everyday life.
What is a Carat?
The metric carat is 0.2 grams exactly, standardised early in the twentieth century to replace a tangle of local carats that differed from one gem market to the next. Its name is traditionally traced to the carob seed, once used as a counterweight for small valuables. The trap is the near-identical karat, which is not a mass at all — it measures gold purity in twenty-fourths, so 18-karat gold is eighteen parts gold to six of other metal. Jewellers also split the carat into 100 points, which is why a "fifty-point" diamond is simply half a carat.
To put both in perspective: a grain of rice weighs roughly 25 milligrams, while a typical engagement-ring diamond weighs about one carat.
The converter above updates as you type, and the table lists common values for quick reference. Need the opposite direction? Use the Carats to Milligrams converter, or browse all Weight & Mass converters.
Frequently asked questions
How many Carats are in one Milligram?
There are 0.005 Carats in one Milligram.
How do I convert Milligrams to Carats?
Multiply the number of Milligrams by 0.005. For example, 10 Milligrams = 0.05 Carats.
What is 100 Milligrams in Carats?
100 Milligrams is equal to 0.5 Carats.
How do I convert Carats to Milligrams?
Multiply the Carats value by 200 (or divide by 0.005).
Is this Milligrams to Carats conversion exact?
Yes, exactly. Both units are fixed against the same base by definition, and 1 Milligram = 0.005 Carats is the complete value — nothing is rounded away.
What is a Milligram?
A milligram is one thousandth of a gram, and it marks the point where measurement stops being about objects and starts being about doses and traces. Nutrition labels give sodium, cholesterol and most vitamins in milligrams; pharmacies dispense tablets by them; environmental limits on lead or arsenic are written in milligrams per litre. Milligrams sit well below the resolution of any kitchen or shop scale — reading them takes a laboratory balance — which is why the unit belongs to pharmacists, chemists and regulators rather than to everyday life.
What is a Carat?
The metric carat is 0.2 grams exactly, standardised early in the twentieth century to replace a tangle of local carats that differed from one gem market to the next. Its name is traditionally traced to the carob seed, once used as a counterweight for small valuables. The trap is the near-identical karat, which is not a mass at all — it measures gold purity in twenty-fourths, so 18-karat gold is eighteen parts gold to six of other metal. Jewellers also split the carat into 100 points, which is why a "fifty-point" diamond is simply half a carat.