How many micrograms are in one milligram?
One milligram is exactly 1000 micrograms.
Convert Milligram (mg) to Microgram (mcg) instantly.
Choose how you want the answer displayed.
1mg=1000mcg
| Quick Conversion | Converted |
|---|---|
| 1 mg | 1,000 mcg |
| 5 mg | 5,000 mcg |
| 10 mg | 10,000 mcg |
| 50 mg | 50,000 mcg |
| 100 mg | 100,000 mcg |
| 500 mg | 500,000 mcg |
| 1,000 mg | 1,000,000 mcg |
| 5,000 mg | 5,000,000 mcg |
A milligram is a metric mass unit equal to one thousandth of a gram.
Milligrams are common in medicine, nutrition, chemistry, lab work, and small-dose measurements.
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.
Mathematically, microgram (mcg) = milligram (mg) multiplied by the conversion factor shown below.
1 mg = 1,000 mcg
1 mcg = 0.001 mg
1 mg x 1,000 = 1,000 mcg
The mass in microgram (mcg) is the mass in milligram (mg) multiplied by 1,000.
mass(mcg) = mass(mg) x 1,000
Or:
mcg = mg x 1,000
Formula: value × 1000
Example: 15 mg = 15,000 mcg
Convert 500 milligram to microgram:
500 mg x 1,000 = 500,000 mcg
Convert 2,500 milligram to microgram:
2,500 mg x 1,000 = 2,500,000 mcg
Precision note: Use the exact relationship of 1000 micrograms per milligram. Keep unit labels visible because mg and mcg differ by a factor of 1000.
1 mg = 1,000 mcg
1 mcg = 0.001 mg
If you are starting with microgram instead, use the microgram to milligram page.
| Milligram [mg] | Microgram [mcg] |
|---|---|
| 0.1 mg | 100 mcg |
| 0.5 mg | 500 mcg |
| 2 mg | 2,000 mcg |
| 3 mg | 3,000 mcg |
| 15 mg | 15,000 mcg |
| 20 mg | 20,000 mcg |
| 25 mg | 25,000 mcg |
| 75 mg | 75,000 mcg |
| 150 mg | 150,000 mcg |
| 250 mg | 250,000 mcg |
| 750 mg | 750,000 mcg |
| 2,500 mg | 2,500,000 mcg |
One milligram is exactly 1000 micrograms.
One microgram is exactly 0.001 milligrams.
Milligrams are useful for small quantities, but micrograms are better for trace amounts where a milligram would be too large.