Convert between micrograms (mcg) and milligrams (mg) using this simple calculator tool. Conversion tables and formulae are also available further down.

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Disclaimer: Whilst every effort has been made in building this calculator, we are not to be held liable for any damages or monetary losses arising out of or in connection with the use of it. This tool is here purely as a service to you, please use it at your own risk. Full disclaimer. Do not use calculations for anything where loss of life, money, property, etc could result from inaccurate calculations.

How many mcg are there in 1 mg?

1 milligram (mg) is equal to 1000 micrograms (mcg). To convert mg to mcg, multiply your mg figure by 1000.

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 1000.

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Micrograms to milligrams chart

MicrogramMilligram Microgram Milligram
10 mcg0.01 mg100 mcg0.1 mg
20 mcg0.02 mg200 mcg0.2 mg
30 mcg0.03 mg300 mcg0.3 mg
40 mcg0.04 mg400 mcg0.4 mg
50 mcg0.05 mg500 mcg0.5 mg
60 mcg0.06 mg600 mcg0.6 mg
70 mcg0.07 mg700 mcg0.7 mg
80 mcg0.08 mg800 mcg0.8 mg
90 mcg0.09 mg900 mcg0.9 mg
100 mcg0.1 mg1000 mcg1 mg

Milligram MicrogramMilligram Microgram
1 mg1000 mcg10 mg10000 mcg
2 mg2000 mcg20 mg20000 mcg
3 mg3000 mcg30 mg30000 mcg
4 mg4000 mcg40 mg40000 mcg
5 mg5000 mcg50 mg50000 mcg
6 mg6000 mcg60 mg60000 mcg
7 mg7000 mcg70 mg70000 mcg
8 mg8000 mcg80 mg80000 mcg
9 mg9000 mcg90 mg90000 mcg
10 mg10000 mcg100 mg100000 mcg

You can use the converter tool at the top of the page to work out an answer for your individual calculation.

If you wish to convert between milligrams and grams, you can do so with the mg to g converter. Alternatively, you can convert between micrograms and grams here.

What is the symbol for micrograms?

Microgram is a unit in the metric system and its symbol is μg. To type the symbol μ on a Mac, press the ⌥ Option + m keys together. On Windows, keep the Alt key depressed whilst you type the digits 2 3 0.

Within medical reports and communication micrograms are commonly referred to with the symbol mcg.