1 µg = 0.001 mg (microgram → milligram)
1 µg = 0.001 mg
1 microgram equals 0.001 milligrams. To convert micrograms to milligrams, multiply the microgram value by 0.001. For quick reference: 1 µg = 0.001 mg, 5 µg = 0.005 mg, 10 µg = 0.01 mg, 100 µg = 0.1 mg.
Start with your value in micrograms.
Multiply the microgram value by 0.001. This is the exact conversion factor from micrograms to milligrams.
The product is your value in milligrams. For example, 5 µg × 0.001 = 0.005 mg.
The exact factor from micrograms to milligrams is 0.001.
Milligrams = Micrograms × 0.001
Fifty common reference values, hand-picked for skim utility. Use the calculator above for any value not listed.
| Micrograms (µg) | Milligrams (mg) |
|---|---|
| 0.1 µg | 0.0001 mg |
| 0.25 µg | 0.00025 mg |
| 0.5 µg | 0.0005 mg |
| 1 µg | 0.001 mg |
| 1.5 µg | 0.0015 mg |
| 2 µg | 0.002 mg |
| 2.5 µg | 0.0025 mg |
| 3 µg | 0.003 mg |
| 4 µg | 0.004 mg |
| 5 µg | 0.005 mg |
| 6 µg | 0.006 mg |
| 7 µg | 0.007 mg |
| 8 µg | 0.008 mg |
| 9 µg | 0.009 mg |
| 10 µg | 0.01 mg |
| 12 µg | 0.012 mg |
| 15 µg | 0.015 mg |
| 18 µg | 0.018 mg |
| 20 µg | 0.02 mg |
| 25 µg | 0.025 mg |
| 30 µg | 0.03 mg |
| 35 µg | 0.035 mg |
| 40 µg | 0.04 mg |
| 45 µg | 0.045 mg |
| 50 µg | 0.05 mg |
| 60 µg | 0.06 mg |
| 70 µg | 0.07 mg |
| 75 µg | 0.075 mg |
| 80 µg | 0.08 mg |
| 90 µg | 0.09 mg |
| 100 µg | 0.1 mg |
| 120 µg | 0.12 mg |
| 125 µg | 0.125 mg |
| 150 µg | 0.15 mg |
| 175 µg | 0.175 mg |
| 180 µg | 0.18 mg |
| 200 µg | 0.2 mg |
| 225 µg | 0.225 mg |
| 250 µg | 0.25 mg |
| 275 µg | 0.275 mg |
| 300 µg | 0.3 mg |
| 350 µg | 0.35 mg |
| 400 µg | 0.4 mg |
| 450 µg | 0.45 mg |
| 500 µg | 0.5 mg |
| 600 µg | 0.6 mg |
| 750 µg | 0.75 mg |
| 1000 µg | 1 mg |
| 2000 µg | 2 mg |
| 5000 µg | 5 mg |
The recommended daily vitamin B12 intake is about 2.4 mcg. A typical multivitamin contains 400 mcg of folic acid.
The microgram (mcg, µg) equals one-millionth of a gram, or one-billionth of a kilogram. It is the standard unit for vitamin doses (like B12 and folate), trace-element content, and hormone dosages where milligram quantities would round to zero.
The milligram (mg) equals one-thousandth of a gram, or one-millionth of a kilogram. It is the standard unit for drug dosages on pharmaceutical labels, vitamin and supplement content, and fine laboratory measurements where a gram would be too coarse.
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