Milligrams to Micrograms Converter

Milligrams to Micrograms Converter

Micrograms
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Grams
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1 mg = 1000 mcg · 1 mg = 0.001 g

How to convert milligrams to micrograms

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

To convert milligrams to grams, divide by 1000. So 500 mg ÷ 1000 = 0.5 g.

1 mg = 1000 mcg = 0.001 g. Micrograms and milligrams are both used in medicine and nutrition. Micrograms (mcg or μg) are used for very small doses like vitamins while milligrams are used for slightly larger doses like common medications.

Milligrams to micrograms conversion table

Milligrams (mg) Micrograms (mcg) Common reference
0.001 mg1 mcgtrace vitamin dose
0.1 mg100 mcgvitamin D dose
0.4 mg400 mcgfolic acid daily dose
0.5 mg500 mcgcommon supplement dose
1 mg1000 mcg1 milligram exactly
5 mg5000 mcghigh dose supplement
10 mg10,000 mcgmedication dose
500 mg500,000 mcgstandard paracetamol

Frequently asked questions

How many micrograms are in a milligram?
There are exactly 1000 micrograms in 1 milligram. 1 mg = 1000 mcg = 0.001 g.
How many mcg is 0.5 mg?
0.5 mg = 500 mcg. Calculation: 0.5 × 1000 = 500 mcg.
How many mcg is 5 mg?
5 mg = 5000 mcg. Calculation: 5 × 1000 = 5000 mcg.
What is the difference between mcg and mg?
1 mg = 1000 mcg. Micrograms are 1000 times smaller than milligrams. mcg is used for very small doses like vitamins while mg is used for larger doses like common pain relievers.
How many mg is 2500 mcg?
2500 mcg = 2.5 mg. Calculation: 2500 ÷ 1000 = 2.5 mg.