4 mg to mcg
Convert 4 milligrams to micrograms (µg) — the answer, the arithmetic and the closest common values, all on one page.
Show your work
4 mg × 1000 = 4,000 mcg.
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Questions
What is 4 milligrams in micrograms (µg)?
4 mg = 4,000 mcg. The arithmetic: 4 mg × 1000 = 4,000 mcg.
How precise is this result?
The factor is exact by definition, so the only rounding is the display. Higher precision is available on the mg to mcg converter page.
What is 4 mcg in mg?
4 mcg = 0.004 mg — the inverse direction.