To convert mg to mcg, multiply your mg figure by 1,000. How many mg are there in 1 mcg? 1 microgram (mcg) is equal to 0.001 milligrams (mg). To convert mcg to mg, divide your mcg figure by 1,000. Micrograms to milligrams chart MicrogramMilligramMicrogramMilligram 10 mcg 0.01 mg 100...