Convert mcg to mg
Enter the number of micrograms that you want to convert to milligrams.
How to Convert Micrograms to Milligrams
The microgram and milligram are both units of weight. By definition, 1 milligram equals exactly 1000 micrograms. This means to convert micrograms to milligrams, you divide by 1000.
Formula
Step-by-Step Example
Convert 5 mcg to milligrams:
We need to convert micrograms to milligrams
Since 1 mg = 1000 mcg, divide by 1000
5 ÷ 1000 = 0.005
5 mcg = 0.005 mg
Microgram to Milligram Conversion Table
Quick reference table for common microgram to milligram conversions. Click any value for detailed calculation.
| Micrograms (mcg) | Milligrams (mg) |
|---|---|
| 0.1 mcg | 0.0001 mg |
| 0.5 mcg | 0.0005 mg |
| 1 mcg | 0.001 mg |
| 2 mcg | 0.002 mg |
| 5 mcg | 0.005 mg |
| 10 mcg | 0.01 mg |
| 25 mcg | 0.025 mg |
| 50 mcg | 0.05 mg |
| 100 mcg | 0.1 mg |
About These Units
Microgram (mcg)
A microgram (mcg or μg) is a metric unit equal to 1/1000 milligram or one millionth of a gram. Micrograms measure vitamins (B12, D, K), hormones, and trace substances. Common notation: mcg (medical) or μg (scientific). There are 1,000 mcg in one milligram.
Milligram (mg)
A milligram (mg) is a metric unit equal to 1/1000 gram or 0.001 grams. Milligrams measure medication dosages, vitamin supplements, caffeine content, and chemical compounds. Common drug doses range from 5 mg to 1000 mg. There are 1,000 mg in one gram.
Frequently Asked Questions
How do I convert micrograms to milligrams?
To convert micrograms to milligrams, divide the value by 1000. For example, 10 mcg = 0.01 mg.
How many milligrams are in 1 microgram?
1 microgram equals 0.001 milligrams.
What is the formula for micrograms to milligrams?
The formula is: mg = mcg ÷ 1000.