Micrograms to Milligrams Converter
Formula
mg = µg / 1000 | µg = mg x 1000 | g = µg / 1,000,000 | ng = µg x 1000
Frequently Asked Questions
How many micrograms are in a milligram?
There are 1,000 micrograms (µg) in one milligram (mg). The prefix 'micro' means one-millionth, and 'milli' means one-thousandth, so 1 mg = 1,000 µg.
Why is the microgram abbreviated as both µg and mcg?
The symbol µg uses the Greek letter mu (µ) and is the official SI abbreviation. In medical and pharmaceutical contexts, 'mcg' is preferred to avoid confusion with 'mg' in handwritten prescriptions, reducing the risk of dosing errors.
What common medications are measured in micrograms?
Many potent medications are dosed in micrograms, including thyroid hormones (levothyroxine, 25-200 mcg), vitamin B12 supplements (100-1,000 mcg), folic acid (400-800 mcg), and certain heart medications like digoxin (125-250 mcg).
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