1 milligram (mg) equals 1,000 micrograms (mcg).

That means:

  • 1 mcg = 0.001 mg.
  • To convert mcg → mg, divide by 1,000 (for example, 500 mcg ÷ 1,000 = 0.5 mg).
  • To convert mg → mcg, multiply by 1,000 (for example, 2 mg × 1,000 = 2,000 mcg).

Bottom note: Information gathered from public forums or data available on the internet and portrayed here.