mcg to mg converter

1 microgram equals 0.001 milligrams. Conversions use mg = mcg × 0.001

mcg → 0.001 mg

mg = mcg × 0.001

Converter

Worked examples

1 mcg = 0.001 mg
2 mcg = 0.002 mg
5 mcg = 0.005 mg
10 mcg = 0.01 mg
100 mcg = 0.1 mg

micrograms (µg) to milligrams conversion table

mcg	mg	Arithmetic
25 mcg	0.025 mg	× 0.001
50 mcg	0.05 mg	× 0.001
100 mcg	0.1 mg	× 0.001
150 mcg	0.15 mg	× 0.001
200 mcg	0.2 mg	× 0.001
250 mcg	0.25 mg	× 0.001
400 mcg	0.4 mg	× 0.001
500 mcg	0.5 mg	× 0.001
1000 mcg	1 mg	× 0.001
1 mcg	0.001 mg	× 0.001
2 mcg	0.002 mg	× 0.001
3 mcg	0.003 mg	× 0.001
4 mcg	0.004 mg	× 0.001
5 mcg	0.005 mg	× 0.001
6 mcg	0.006 mg	× 0.001
8 mcg	0.008 mg	× 0.001
10 mcg	0.01 mg	× 0.001
12 mcg	0.012 mg	× 0.001
15 mcg	0.015 mg	× 0.001
20 mcg	0.02 mg	× 0.001
30 mcg	0.03 mg	× 0.001
40 mcg	0.04 mg	× 0.001
60 mcg	0.06 mg	× 0.001
70 mcg	0.07 mg	× 0.001
80 mcg	0.08 mg	× 0.001
90 mcg	0.09 mg	× 0.001

How to convert mcg to mg

Take your value in micrograms (µg).
Multiply by 0.001
That is your answer in milligrams — no rounding needed until you choose a display precision.

Related conversions

mg to mcg mcg to g all medical dose units

Questions

How many milligrams in 1 microgram?

Exactly 0.001 mg. The factor follows from the definitions of both units, not from a measurement, so it is exact.

How do I convert mcg to mg?

Multiply the micrograms (µg) figure by 0.001 — or use the converter above, which updates as you type.

Is mcg to mg the same as mg to mcg?

No — they are inverses. One mcg is 0.001 mg, while one mg is 1,000 mcg.

What is 25 mcg in mg?

25 mcg = 0.025 mg (see the value page for the full arithmetic).