How do I convert micrograms to milligrams?

Divide the number of micrograms by 1000. For example, 1000 µg equals 1 mg, and 2500 µg equals 2.5 mg.

How many micrograms are in one milligram?

There are exactly 1000 micrograms in one milligram (1 mg = 1000 µg). Micrograms are sometimes written as mcg.

Is anything uploaded?

No — every conversion runs locally in your browser and nothing is sent to any server.

Micrograms to Milligrams Converter

This free mass converter changes micrograms (µg, also written mcg) into milligrams (mg) and back again. The relationship is exact: 1 mg = 1000 µg, so 2500 µg equals 2.5 mg.

Type a value in either field — the result updates in real time. The reference table below shows common conversion values at a glance. All calculations run entirely in your browser with no data sent to any server.

Micrograms (µg)	Milligrams (mg)
100 µg	0.1 mg
500 µg	0.5 mg
1000 µg	1 mg
2500 µg	2.5 mg