Milligrams to Micrograms: the quick answer
1 mg = 1,000 µg
1 milligram equals 1,000 micrograms
To convert milligrams to micrograms, multiply the value by 1,000. To go the other way, multiply micrograms by 0.001 to get milligrams.
Enter details
1 milligram =
1,000 micrograms
1 microgram =
0.001 milligrams
Formula
µg = mg × 1,000
Handy values
5 mg = 5,000 µg · 10 mg = 10,000 µg · 100 mg = 100,000 µg
Conversion at a glance
Formula
Milligrams to Micrograms
µg = mg × 1,000
Micrograms to Milligrams
mg = µg × 0.001
Where
- mg = the weight in milligrams
- µg = the weight in micrograms
Every unit here is defined by its weight in kilograms, so the conversion factor is (kilograms per milligram) ÷ (kilograms per microgram).
Milligrams to Micrograms conversion table
| Milligrams (mg) | Micrograms (µg) |
|---|---|
| 1 mg | 1,000 µg |
| 2 mg | 2,000 µg |
| 3 mg | 3,000 µg |
| 4 mg | 4,000 µg |
| 5 mg | 5,000 µg |
| 6 mg | 6,000 µg |
| 7 mg | 7,000 µg |
| 8 mg | 8,000 µg |
| 9 mg | 9,000 µg |
| 10 mg | 10,000 µg |
| 12 mg | 12,000 µg |
| 14 mg | 14,000 µg |
| 15 mg | 15,000 µg |
| 20 mg | 20,000 µg |
| 21 mg | 21,000 µg |
| 24 mg | 24,000 µg |
| 25 mg | 25,000 µg |
| 30 mg | 30,000 µg |
| 40 mg | 40,000 µg |
| 50 mg | 50,000 µg |
| 60 mg | 60,000 µg |
| 75 mg | 75,000 µg |
| 80 mg | 80,000 µg |
| 100 mg | 100,000 µg |
| 200 mg | 200,000 µg |
| 250 mg | 250,000 µg |
| 300 mg | 300,000 µg |
| 400 mg | 400,000 µg |
| 500 mg | 500,000 µg |
| 750 mg | 750,000 µg |
| 1,000 mg | 1,000,000 µg |
Worked examples
About these units
Milligram (mg). A milligram is one thousandth of a gram, used for medicine doses and nutrition labels.
Microgram (µg). A microgram is one millionth of a gram, used for vitamins, medicines and trace amounts.
Frequently asked questions
How many micrograms are in one milligram?
There are 1,000 micrograms in one milligram.
How do I convert milligrams to micrograms?
Multiply the number of milligrams by 1,000. For example, 10 milligrams equal 10,000 micrograms.
How many milligrams are in one microgram?
One microgram equals 0.001 milligrams.
How many micrograms is 12 milligrams?
12,000 micrograms. Other common values: 5 milligrams = 5,000 micrograms and 100 milligrams = 100,000 micrograms.
More weight conversions
From milligrams
mg to kg
mg to g
mg to lb
mg to oz
mg to st
mg to t
mg to ton (US)
mg to ton (UK)
mg to q
mg to ct
mg to oz t
mg to tola
To micrograms
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