milligram
mcg

# ››More information from the unit converter

How many milligram in 1 mcg? The answer is 0.001.
We assume you are converting between milligram and microgram.
You can view more details on each measurement unit:
milligram or mcg
The SI base unit for mass is the kilogram.
1 kilogram is equal to 1000000 milligram, or 1000000000 mcg.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between milligrams and micrograms.
Type in your own numbers in the form to convert the units!

# ››Want other units?

You can do the reverse unit conversion from mcg to milligram, or enter any two units below:

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# ››Definition: Milligram

The SI prefix "milli" represents a factor of 10-3, or in exponential notation, 1E-3.

So 1 milligram = 10-3 grams-force.

# ››Definition: Microgram

The SI prefix "micro" represents a factor of 10-6, or in exponential notation, 1E-6.

So 1 microgram = 10-6 grams-force.

# ››Metric conversions and more

ConvertUnits.com provides an online conversion calculator for all types of measurement units. You can find metric conversion tables for SI units, as well as English units, currency, and other data. Type in unit symbols, abbreviations, or full names for units of length, area, mass, pressure, and other types. Examples include mm, inch, 100 kg, US fluid ounce, 6'3", 10 stone 4, cubic cm, metres squared, grams, moles, feet per second, and many more!