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# What is the difference between mcg and mg?

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A milligram, abbreviated as mg, is a metric unit of measure that is equal to 1/1000th (one one thousandth) of a gram, while a microgram, abbreviated mcg, is a metric unit of measure that is equal to 1/1000000th (one one millionth) of a gram. One microgram is equal to 0.0010000 milligrams.

## Keep Learning

Though they carry different values, micrograms and milligrams have similar characteristics. Both micrograms and milligrams can be used to measure both weight and mass. Micrograms are a common unit of measurement in the medical field in the United States even though the U.S. typically doesn't use the metric system.

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## Related Questions

• A:

Doxycycline HYC 100 milligram is an antibiotic that is used to treat bacterial infections, such as periodontitis, urinary tract infections, chlamydia, acne and gonorrhea, according to RxList. It is also used to treat bumps, acne-like blemishes and bumps that are caused by rosacea.

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• A:

Depending on the specific conversion a person may require, 1 milligram can equal 1000 micrograms, 0.001 gram, or 0.1 centigrams in the metric system. However, 1 milligram can also be converted to different Imperial measurements like ounces and drams.

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• A:

There are a thousand milligrams in one gram, and there are a thousand micrograms in one milligram. The conversion factor from microgram to milligram a thousandfold. It can be done by expressing the measurement in micrograms, as a decimal number, and moving the decimal point three places to the right.