Milligrams to Micrograms
A milligram is one thousandth of a gram, the standard unit for medication dosages on drug labels. A microgram is one millionth of a gram, used to measure doses of vitamins, hormones, and trace medications. 1 mg equals 1,000 µg, so converting between them is a matter of multiplying by that fixed factor — type any value into the converter below and both sides update instantly as you type.
Both units belong to mass, measured here against mass's base unit (kg) — every other mass unit on this site converts through that same reference point, which is why the table below can also be read as a quick cross-check against nearby values.
Formula
µg = mg × 1,000
mg = µg × 0.001
Worked example: 5 mg × 1,000 = 5,000 µg.
Conversion table
| Milligram (mg) | Microgram (µg) |
|---|---|
| 1 mg | 1,000 µg |
| 2 mg | 2,000 µg |
| 3 mg | 3,000 µg |
| 5 mg | 5,000 µg |
| 10 mg | 10,000 µg |
| 20 mg | 20,000 µg |
| 25 mg | 25,000 µg |
| 50 mg | 50,000 µg |
| 100 mg | 100,000 µg |
| 250 mg | 250,000 µg |
| 500 mg | 500,000 µg |
| 1,000 mg | 1,000,000 µg |
Frequently asked
- How many Micrograms in a milligram?
- 1 mg equals 1,000 µg.
- How do I convert Milligrams to Micrograms?
- Multiply the value in mg by 1,000 to get µg. The converter above does this instantly as you type.
- Is the conversion exact?
- Yes — Milligram and Microgram are both defined by a fixed conversion factor to mass's base unit (kg), so the result shown is exact to the precision displayed, not an approximation.