Convert mg to mcg
Convert milligrams to micrograms by entering a value below.
How to Convert Milligrams to Micrograms
The milligram and microgram are both units of weight. By definition, 1 milligram equals exactly 1000 micrograms. This means to convert milligrams to micrograms, you multiply by 1000.
Formula
Step-by-Step Example
Convert 5 mg to micrograms:
We need to convert milligrams to micrograms
Since 1 mg = 1000 mcg, multiply by 1000
5 × 1000 = 5000
5 mg = 5000 mcg
Milligram to Microgram Conversion Table
Quick reference table for common milligram to microgram conversions. Click any value for detailed calculation.
| Milligrams (mg) | Micrograms (mcg) |
|---|---|
| 0.1 mg | 100 mcg |
| 0.5 mg | 500 mcg |
| 1 mg | 1000 mcg |
| 2 mg | 2000 mcg |
| 5 mg | 5000 mcg |
| 10 mg | 10000 mcg |
| 25 mg | 25000 mcg |
| 50 mg | 50000 mcg |
| 100 mg | 100000 mcg |
About These Units
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.
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.
Frequently Asked Questions
How do I convert milligrams to micrograms?
To convert milligrams to micrograms, multiply the value by 1000. For example, 10 mg = 10000 mcg.
How many micrograms are in 1 milligram?
1 milligram equals 1000 micrograms.
What is the formula for milligrams to micrograms?
The formula is: mcg = mg × 1000.