Convert Milligrams to Micrograms
1 milligram is 1,000 mcg. One milligram is exactly 1000 micrograms.
One milligram is 1000 micrograms. To convert milligrams to micrograms, multiply by 1000; to go the other way, divide by 1000 or multiply by 0.001. The factor is exact rather than rounded: it follows from NIST Handbook 44. One thousandth of a gram, and exactly 1,000 micrograms.
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Micrograms
1,000 mcg
- Milligrams × 1000
value * 10001,000 mcg
1 milligram in every weight unit
| Unit | Value | Exact factor |
|---|---|---|
| ounces | 0.00003527396195 oz | × 0.0000352739619496 |
| pounds | 0.000002204622622 lb | × 0.00000220462262185 |
| stone | 0.0000001574730444 st | × 0.000000157473044418 |
| US tons | 0.000000001102311311 ton | × 0.00000000110231131092 |
| micrograms | 1,000 mcg | × 1,000 |
| milligrams (as entered) | 1 mg | — |
| grams | 0.001 g | × 0.001 |
| kilograms | 0.000001 kg | × 0.000001 |
| tonnes | 0.000000001 t | × 0.000000001 |
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 milligrams to micrograms?
- 1.Take the measurement in milligrams.
- 2.Multiply by 1000 — that is how many micrograms fit in one milligram.
- 3.To go back the other way, divide by 1000, or multiply by 0.001.
Milligrams to micrograms conversion table
| Milligrams | Micrograms |
|---|---|
| 1 mg | 1,000 mcg |
| 2 mg | 2,000 mcg |
| 3 mg | 3,000 mcg |
| 4 mg | 4,000 mcg |
| 5 mg | 5,000 mcg |
| 6 mg | 6,000 mcg |
| 7 mg | 7,000 mcg |
| 8 mg | 8,000 mcg |
| 9 mg | 9,000 mcg |
| 10 mg | 10,000 mcg |
| 12 mg | 12,000 mcg |
| 15 mg | 15,000 mcg |
| 20 mg | 20,000 mcg |
| 25 mg | 25,000 mcg |
| 50 mg | 50,000 mcg |
| 100 mg | 100,000 mcg |
What are milligrams and micrograms?
- Milligram (mg)
- One thousandth of a gram, and exactly 1,000 micrograms. The unit almost every medicine is dosed in.
- Microgram (mcg)
- 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.
Questions people actually ask
- How many micrograms are in a milligram?
- 1000. 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.
- How do I convert micrograms back to milligrams?
- Divide by 1000, or multiply by 0.001 — they are the same operation.
Other weight conversions
Micrograms to milligrams — the same conversion the other way.