Convert Micrograms to Carats
1 microgram is 0.000005 ct. One microgram is exactly 0.000005 carats.
One microgram is 5.0000 × 10^-6 carats. To convert micrograms to carats, multiply by 5.0000 × 10^-6; to go the other way, divide by 5.0000 × 10^-6 or multiply by 200000. The relation is exact but the figure is not: it is a rounding of a number that does not terminate, and it follows from NIST Handbook 44. One millionth of a gram.
Factor checked against the defining standard · How we check
- Micrograms × 5.0000 × 10^-6
1 * 0.0000050 ct
1 microgram in every weight unit
| Unit | Value | Exact factor |
|---|---|---|
| ounces | 0.00000003527396195 oz | × 0.0000000352739619496 |
| pounds | 0.000000002204622622 lb | × 0.00000000220462262185 |
| stone | 0.0000000001574730444 st | × 0.000000000157473044418 |
| US tons | 0.000000000001102311311 ton | × 0.00000000000110231131092 |
| micrograms (as entered) | 1 mcg | — |
| milligrams | 0.001 mg | × 0.001 |
| centigrams | 0.0001 cg | × 0.0001 |
| grams | 0.000001 g | × 0.000001 |
| kilograms | 0.000000001 kg | × 0.000000001 |
| slugs | 0.00000000006852176586 slug | × 0.0000000000685217658568 |
| tonnes | 0.000000000001 t | × 0.000000000001 |
| carats | 0.000005 ct | × 0.000005 |
| troy ounces | 0.00000003215074657 ozt | × 0.0000000321507465686 |
| grains | 0.00001543235835 gr | × 0.0000154323583529 |
| long tons | 0 LT | × 0.000000000000984206527611 |
Factors are entered by hand from NIST Handbook 44 rather than derived from a units library, so the ones that terminate are exact rather than rounded.
How do you convert micrograms to carats? The converter and the working
- 1.Take the measurement in micrograms.
- 2.Multiply by 5.0000 × 10^-6 — that is how many carats fit in one microgram.
- 3.To go back the other way, divide by 5.0000 × 10^-6, or multiply by 200000.
Worked example: 25 micrograms to carats
- Formula
- mcg × 5.0000 × 10^-6 = ct
- Arithmetic
- 25 × 5.0000 × 10^-6 = 0.000125 ct
- Answer
- 25 mcg = 0.000125 ct
The factor is rounded for display; the figure above is computed from the full value.
Micrograms to carats conversion table
| Micrograms | Carats |
|---|---|
| 1 mcg | 0.000005 ct |
| 2 mcg | 0.00001 ct |
| 3 mcg | 0.000015 ct |
| 4 mcg | 0.00002 ct |
| 5 mcg | 0.000025 ct |
| 6 mcg | 0.00003 ct |
| 7 mcg | 0.000035 ct |
| 8 mcg | 0.00004 ct |
| 9 mcg | 0.000045 ct |
| 10 mcg | 0.00005 ct |
| 12 mcg | 0.00006 ct |
| 15 mcg | 0.000075 ct |
| 20 mcg | 0.0001 ct |
| 25 mcg | 0.000125 ct |
| 50 mcg | 0.00025 ct |
| 100 mcg | 0.0005 ct |
| 200 mcg | 0.001 ct |
| 300 mcg | 0.0015 ct |
| 500 mcg | 0.0025 ct |
| 1000 mcg | 0.01 ct |
| 2000 mcg | 0.01 ct |
| 5000 mcg | 0.03 ct |
| 10000 mcg | 0.05 ct |
What is a microgram?
One millionth of a gram. Written mcg rather than µg on labels deliberately: the Greek letter is the character most often lost in transcription, and a factor of a thousand in a dose is not a rounding error.
What is a carat?
Exactly 200 milligrams, fixed by international agreement in 1907 after centuries of local carats. It weighs a gemstone; the karat that grades gold is a different word for a different thing — purity in twenty-fourths.
How many carats are in a microgram?
One microgram is 5.0000 × 10^-6 carats. Going the other way, one carat is 200000 micrograms. Both figures come from the same defined relation rather than from a measurement, which is why they are the same today as they were in 1959.
Every weight unit here
The whole group — 15 units with their symbols and the size of each one in kilograms — is on the conversion index, along with every pair it makes. The table above already gives each of them relative to a microgram.
Cite this page
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- Rule Calculator. (2026). Convert Micrograms to carats. Rule Calculator. https://rulecalculators.com/convert/microgram-to-carat
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- Chicago
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Questions people actually ask
- How many carats are in a microgram?
- 5.0000 × 10^-6. Exactly 200 milligrams, fixed by international agreement in 1907 after centuries of local carats. It weighs a gemstone; the karat that grades gold is a different word for a different thing — purity in twenty-fourths.
- How do I convert carats back to micrograms?
- Divide by 5.0000 × 10^-6, or multiply by 200000 — they are the same operation.
Other weight conversions
Carats to micrograms — the same conversion the other way.