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MCG to MG Converter

Enter any number of micrograms and the milligrams appear as you type. Press ⇄ to swap the direction, and see the step-by-step math under the result.

MicrogramsFrom

mcg

MilligramsTo

Decimal places

Step-by-step calculation

How to use the MCG to MG Converter

Type a value in the Micrograms box. The milligrams result appears instantly.
Going the other way? Type in the Milligrams box, or press the ⇄ swap button.
Set the precision with the decimal places menu.
Check the working in the step-by-step box, then press Copy result or click any row in the tables below.

Micrograms to milligrams formula

mg = mcg ÷ 1000

Take the value in micrograms.
Divide it by 1000 (the number of micrograms in one milligram).

Example: 1,000 mcg ÷ 1000 = 1 mg.

Reverse formula (milligrams to micrograms): mcg = mg × 1000. Example: 0.1 mg × 1000 = 100 mcg.

The factor is a whole number (1000), so this one is easy to do in your head or with long division.

mcg to mg conversion table (1–100)

Click any row to load it into the converter.

Micrograms to milligrams

Micrograms	Milligrams
1 mcg	0.001 mg
2 mcg	0.002 mg
3 mcg	0.003 mg
4 mcg	0.004 mg
5 mcg	0.005 mg
6 mcg	0.006 mg
7 mcg	0.007 mg
8 mcg	0.008 mg
9 mcg	0.009 mg
10 mcg	0.01 mg
11 mcg	0.011 mg
12 mcg	0.012 mg
13 mcg	0.013 mg
14 mcg	0.014 mg
15 mcg	0.015 mg
16 mcg	0.016 mg
17 mcg	0.017 mg
18 mcg	0.018 mg
19 mcg	0.019 mg
20 mcg	0.02 mg
21 mcg	0.021 mg
22 mcg	0.022 mg
23 mcg	0.023 mg
24 mcg	0.024 mg
25 mcg	0.025 mg
26 mcg	0.026 mg
27 mcg	0.027 mg
28 mcg	0.028 mg
29 mcg	0.029 mg
30 mcg	0.03 mg
31 mcg	0.031 mg
32 mcg	0.032 mg
33 mcg	0.033 mg
34 mcg	0.034 mg
35 mcg	0.035 mg
36 mcg	0.036 mg
37 mcg	0.037 mg
38 mcg	0.038 mg
39 mcg	0.039 mg
40 mcg	0.04 mg
41 mcg	0.041 mg
42 mcg	0.042 mg
43 mcg	0.043 mg
44 mcg	0.044 mg
45 mcg	0.045 mg
46 mcg	0.046 mg
47 mcg	0.047 mg
48 mcg	0.048 mg
49 mcg	0.049 mg
50 mcg	0.05 mg
51 mcg	0.051 mg
52 mcg	0.052 mg
53 mcg	0.053 mg
54 mcg	0.054 mg
55 mcg	0.055 mg
56 mcg	0.056 mg
57 mcg	0.057 mg
58 mcg	0.058 mg
59 mcg	0.059 mg
60 mcg	0.06 mg
61 mcg	0.061 mg
62 mcg	0.062 mg
63 mcg	0.063 mg
64 mcg	0.064 mg
65 mcg	0.065 mg
66 mcg	0.066 mg
67 mcg	0.067 mg
68 mcg	0.068 mg
69 mcg	0.069 mg
70 mcg	0.07 mg
71 mcg	0.071 mg
72 mcg	0.072 mg
73 mcg	0.073 mg
74 mcg	0.074 mg
75 mcg	0.075 mg
76 mcg	0.076 mg
77 mcg	0.077 mg
78 mcg	0.078 mg
79 mcg	0.079 mg
80 mcg	0.08 mg
81 mcg	0.081 mg
82 mcg	0.082 mg
83 mcg	0.083 mg
84 mcg	0.084 mg
85 mcg	0.085 mg
86 mcg	0.086 mg
87 mcg	0.087 mg
88 mcg	0.088 mg
89 mcg	0.089 mg
90 mcg	0.09 mg
91 mcg	0.091 mg
92 mcg	0.092 mg
93 mcg	0.093 mg
94 mcg	0.094 mg
95 mcg	0.095 mg
96 mcg	0.096 mg
97 mcg	0.097 mg
98 mcg	0.098 mg
99 mcg	0.099 mg
100 mcg	0.1 mg

Milligrams to micrograms

Milligrams	Micrograms
1 mg	1,000 mcg
2 mg	2,000 mcg
3 mg	3,000 mcg
4 mg	4,000 mcg
5 mg	5,000 mcg
6 mg	6,000 mcg
7 mg	7,000 mcg
8 mg	8,000 mcg
9 mg	9,000 mcg
10 mg	10,000 mcg
11 mg	11,000 mcg
12 mg	12,000 mcg
13 mg	13,000 mcg
14 mg	14,000 mcg
15 mg	15,000 mcg
16 mg	16,000 mcg
17 mg	17,000 mcg
18 mg	18,000 mcg
19 mg	19,000 mcg
20 mg	20,000 mcg
21 mg	21,000 mcg
22 mg	22,000 mcg
23 mg	23,000 mcg
24 mg	24,000 mcg
25 mg	25,000 mcg
26 mg	26,000 mcg
27 mg	27,000 mcg
28 mg	28,000 mcg
29 mg	29,000 mcg
30 mg	30,000 mcg
31 mg	31,000 mcg
32 mg	32,000 mcg
33 mg	33,000 mcg
34 mg	34,000 mcg
35 mg	35,000 mcg
36 mg	36,000 mcg
37 mg	37,000 mcg
38 mg	38,000 mcg
39 mg	39,000 mcg
40 mg	40,000 mcg
41 mg	41,000 mcg
42 mg	42,000 mcg
43 mg	43,000 mcg
44 mg	44,000 mcg
45 mg	45,000 mcg
46 mg	46,000 mcg
47 mg	47,000 mcg
48 mg	48,000 mcg
49 mg	49,000 mcg
50 mg	50,000 mcg
51 mg	51,000 mcg
52 mg	52,000 mcg
53 mg	53,000 mcg
54 mg	54,000 mcg
55 mg	55,000 mcg
56 mg	56,000 mcg
57 mg	57,000 mcg
58 mg	58,000 mcg
59 mg	59,000 mcg
60 mg	60,000 mcg
61 mg	61,000 mcg
62 mg	62,000 mcg
63 mg	63,000 mcg
64 mg	64,000 mcg
65 mg	65,000 mcg
66 mg	66,000 mcg
67 mg	67,000 mcg
68 mg	68,000 mcg
69 mg	69,000 mcg
70 mg	70,000 mcg
71 mg	71,000 mcg
72 mg	72,000 mcg
73 mg	73,000 mcg
74 mg	74,000 mcg
75 mg	75,000 mcg
76 mg	76,000 mcg
77 mg	77,000 mcg
78 mg	78,000 mcg
79 mg	79,000 mcg
80 mg	80,000 mcg
81 mg	81,000 mcg
82 mg	82,000 mcg
83 mg	83,000 mcg
84 mg	84,000 mcg
85 mg	85,000 mcg
86 mg	86,000 mcg
87 mg	87,000 mcg
88 mg	88,000 mcg
89 mg	89,000 mcg
90 mg	90,000 mcg
91 mg	91,000 mcg
92 mg	92,000 mcg
93 mg	93,000 mcg
94 mg	94,000 mcg
95 mg	95,000 mcg
96 mg	96,000 mcg
97 mg	97,000 mcg
98 mg	98,000 mcg
99 mg	99,000 mcg
100 mg	100,000 mcg

Common values

Micrograms	Milligrams	Example
1 mcg	0.001 mg	1 mcg
2.4 mcg	0.0024 mg	B12 daily value
10 mcg	0.01 mg	10 mcg
25 mcg	0.03 mg	25 mcg (1,000 IU vitamin D)
50 mcg	0.05 mg	50 mcg
100 mcg	0.1 mg	100 mcg
400 mcg	0.4 mg	400 mcg folate
500 mcg	0.5 mg	500 mcg
1,000 mcg	1 mg	1,000 mcg
5,000 mcg	5 mg	5,000 mcg

About micrograms and milligrams

Micrograms (mcg). The microgram (mcg or µg) is one millionth of a gram, or one thousandth of a milligram. Vitamins such as B12, D and folate are often labelled in mcg.

Milligrams (mg). The milligram is one thousandth of a gram. It is used for nutrients, supplements and medicine strengths.

Frequently asked questions

How many milligrams in 1 microgram?

One microgram equals 0.001 milligrams. Looking at it the other way, one milligram is 1,000 micrograms.

How do you convert micrograms to milligrams?

Divide the number of micrograms by 1000. For example, 1,000 mcg ÷ 1000 = 1 mg.

What is 100 micrograms in milligrams?

100 mcg is 0.1 mg.

How do I convert milligrams back to micrograms?

Multiply by 1000, or press the ⇄ swap button above. For example, 0.1 mg × 1000 = 100 mcg.

What does mcg mean on a label?

mcg (also written µg) means microgram, one millionth of a gram. 1 mg = 1,000 mcg. Some vitamin labels also use IU, which depends on the vitamin, so use the label's own mcg value when you have it.

Is this converter free and private?

Yes. It is free with no sign-up, and every calculation runs in your browser, so nothing you type is sent to a server.

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