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Micrograms and Milligrams Converter

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

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.

On this page:

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.

Micrograms to milligrams chart

Microgram Milligram Microgram Milligram
10 mcg 0.01 mg 100 mcg 0.1 mg
20 mcg 0.02 mg 200 mcg 0.2 mg
30 mcg 0.03 mg 300 mcg 0.3 mg
40 mcg 0.04 mg 400 mcg 0.4 mg
50 mcg 0.05 mg 500 mcg 0.5 mg
60 mcg 0.06 mg 600 mcg 0.6 mg
70 mcg 0.07 mg 700 mcg 0.7 mg
80 mcg 0.08 mg 800 mcg 0.8 mg
90 mcg 0.09 mg 900 mcg 0.9 mg
100 mcg 0.1 mg 1000 mcg 1 mg

Milligrams to micrograms chart

Milligram Microgram Milligram Microgram
1 mg 1000 mcg 10 mg 10000 mcg
2 mg 2000 mcg 20 mg 20000 mcg
3 mg 3000 mcg 30 mg 30000 mcg
4 mg 4000 mcg 40 mg 40000 mcg
5 mg 5000 mcg 50 mg 50000 mcg
6 mg 6000 mcg 60 mg 60000 mcg
7 mg 7000 mcg 70 mg 70000 mcg
8 mg 8000 mcg 80 mg 80000 mcg
9 mg 9000 mcg 90 mg 90000 mcg
10 mg 10000 mcg 100 mg 100000 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.


If you have any suggestions or queries with this conversion tool, please contact me.