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Micrograms to Milligrams Converter

µg → mg: type a value and the result appears instantly.

1 µg = 0.001 mg
1 mg = 1,000 µg
—

How to convert micrograms to milligrams

Use this formula:

mg = µg × 0.001

Examples

µg to mg conversion chart

micrograms (µg)milligrams (mg)
0.1 µg0.0001 mg
0.25 µg0.00025 mg
0.5 µg0.0005 mg
1 µg0.001 mg
2 µg0.002 mg
3 µg0.003 mg
4 µg0.004 mg
5 µg0.005 mg
6 µg0.006 mg
7 µg0.007 mg
8 µg0.008 mg
9 µg0.009 mg
10 µg0.01 mg
12 µg0.012 mg
15 µg0.015 mg
20 µg0.02 mg
25 µg0.025 mg
30 µg0.03 mg
40 µg0.04 mg
50 µg0.05 mg
60 µg0.06 mg
70 µg0.07 mg
75 µg0.075 mg
80 µg0.08 mg
90 µg0.09 mg
100 µg0.1 mg
150 µg0.15 mg
200 µg0.2 mg
250 µg0.25 mg
500 µg0.5 mg
1,000 µg1 mg

About the units

Microgram (µg) is a metric (SI) unit. 1 µg = 0.001 mg.

Milligram (mg) is a metric (SI) unit. 1 mg = 0.001 g.

Frequently asked questions

How do I convert micrograms to milligrams?
Multiply the value in µg by 0.001.
How many milligrams are in 1 microgram?
1 µg = 0.001 mg.
What is 12 µg in mg?
12 µg = 0.012 mg.
How do I convert milligrams to micrograms?
Use the reverse converter: mg → µg.

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Sources: NIST SP 811 · BIPM SI Brochure · NIST Handbook 44. Last reviewed: 2026-10 · FreeUnitConverters