How many milligrams are in one microgram?
One microgram is exactly 0.001 milligrams.
Convert Microgram (mcg) to Milligram (mg) instantly.
Choose how you want the answer displayed.
1mcg=0.001mg
| Quick Conversion | Converted |
|---|---|
| 1 mcg | 0.001 mg |
| 10 mcg | 0.01 mg |
| 50 mcg | 0.05 mg |
| 100 mcg | 0.1 mg |
| 500 mcg | 0.5 mg |
| 1,000 mcg | 1 mg |
| 5,000 mcg | 5 mg |
| 10,000 mcg | 10 mg |
A microgram is a metric mass unit equal to one thousandth of a milligram.
Micrograms are used for very small quantities in medicine, nutrition, chemistry, environmental testing, and laboratory work.
A milligram is a metric mass unit equal to 1000 micrograms.
Milligrams are common in medicine, nutrition, chemistry, lab work, and small-dose measurements.
Mathematically, milligram (mg) = microgram (mcg) multiplied by the conversion factor shown below.
1 mcg = 0.001 mg
1 mg = 1,000 mcg
1 mcg x 0.001 = 0.001 mg
The mass in milligram (mg) is the mass in microgram (mcg) multiplied by 0.001.
mass(mg) = mass(mcg) x 0.001
Or:
mg = mcg x 0.001
Formula: value × 0.001
Example: 15 mcg = 0.015 mg
Convert 1,000 microgram to milligram:
1,000 mcg x 0.001 = 1 mg
Convert 5,000 microgram to milligram:
5,000 mcg x 0.001 = 5 mg
Precision note: Use the exact relationship of 1000 micrograms per milligram. Preserve decimal milligrams when the microgram value is not a whole milligram.
1 mcg = 0.001 mg
1 mg = 1,000 mcg
If you are starting with milligram instead, use the milligrams to micrograms page.
| Microgram [mcg] | Milligram [mg] |
|---|---|
| 0.1 mcg | 0.0001 mg |
| 0.5 mcg | 0.0005 mg |
| 2 mcg | 0.002 mg |
| 5 mcg | 0.005 mg |
| 25 mcg | 0.025 mg |
| 75 mcg | 0.075 mg |
| 150 mcg | 0.15 mg |
| 250 mcg | 0.25 mg |
| 750 mcg | 0.75 mg |
| 2,500 mcg | 2.5 mg |
| 7,500 mcg | 7.5 mg |
| 25,000 mcg | 25 mg |
One microgram is exactly 0.001 milligrams.
One milligram contains exactly 1000 micrograms.
The units differ by a factor of 1000, so using the wrong one can make a small quantity look much larger or smaller than it is.