Milligrams to Micrograms Converter
Convert milligrams to micrograms with a free calculator
How to Convert Milligrams to Micrograms
Formula: 1 mg = 1,000 µg
Multiply your milligrams value by 1,000 to get the equivalent in micrograms. The conversion factor 1,000 is based on the internationally accepted definitions of both units.
Milligrams to Micrograms Reference Table
| Milligrams (mg) | Micrograms (µg) |
|---|---|
| 1 mg | 1,000 µg |
| 5 mg | 5,000 µg |
| 10 mg | 10,000 µg |
| 25 mg | 25,000 µg |
| 50 mg | 50,000 µg |
| 100 mg | 100,000 µg |
| 500 mg | 500,000 µg |
| 1000 mg | 1,000,000 µg |
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Frequently Asked Questions
How many micrograms is 0.5 mg? +
0.5 mg equals 500 micrograms.
Why do some medications use micrograms instead of milligrams? +
Very potent drugs are dosed in micrograms because even small mg differences could cause harm. Fentanyl, for example, is dosed in micrograms because a few milligrams can be lethal.
What is the symbol for microgram? +
The official symbol is µg (Greek letter mu + g). Since µ is hard to type, "mcg" is commonly used on labels, especially in the US.