Micrograms to Milligrams Converter

Micrograms to Milligrams Converter

Milligrams
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Grams
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1 mg = 1000 mcg · 1 g = 1,000,000 mcg

How to convert micrograms to milligrams

To convert micrograms to milligrams, divide by 1000. There are exactly 1000 micrograms in every milligram. For example, 500 mcg ÷ 1000 = 0.5 mg. Going the other way, multiply milligrams by 1000 to get micrograms.

To convert micrograms to grams, divide by 1,000,000. So 500 mcg ÷ 1,000,000 = 0.0005 g.

1 mg = 1000 mcg. The prefix “micro” means one millionth. Micrograms are used in medicine and nutrition for very small doses such as vitamins B12, D, and folate.

Micrograms to milligrams conversion table

Micrograms (mcg) Milligrams (mg) Common reference
1 mcg0.001 mgtrace amount
2.4 mcg0.0024 mgdaily B12 requirement
10 mcg0.01 mgvitamin D dose
100 mcg0.1 mgfolate supplement
400 mcg0.4 mgfolic acid daily dose
500 mcg0.5 mgcommon supplement dose
1000 mcg1 mg1 milligram exactly
5000 mcg5 mghigh dose supplement

Frequently asked questions

How many micrograms are in a milligram?
There are exactly 1000 micrograms in 1 milligram. The prefix “micro” means one millionth and “milli” means one thousandth.
How many mg is 400 mcg?
400 mcg = 0.4 mg. This is the recommended daily dose of folic acid for pregnant women.
How many mcg is 1 mg?
1 mg = 1000 mcg. Calculation: 1 × 1000 = 1000 mcg.
How many mg is 500 mcg?
500 mcg = 0.5 mg. Calculation: 500 ÷ 1000 = 0.5 mg.
What is a microgram used for?
Micrograms are used in medicine and nutrition for very small doses such as vitamins B12, D, folate, and some medications. Nutrition labels often list vitamins in mcg.