How many milligrams are in 1 microgram?

1 µg equals 0.001 mg. This is an exact conversion factor defined by NIST.

How do I convert micrograms to milligrams?

Multiply the value in µg by the conversion factor. For example, 10 µg = 0.01 mg. Use our calculator above for instant results.

Is the micrograms to milligrams conversion exact?

Yes, this conversion is mathematically exact based on the international definition of these units (NIST SP 811).

Can I convert micrograms to milligrams offline?

Yes! OmniConvert runs entirely in your browser — no internet connection needed after the page loads. Your data never leaves your device, ensuring complete privacy.

What is the difference between micrograms and milligrams?

Micrograms (µg) and Milligrams (mg) are both units of mass but belong to different measurement systems. 1 µg = 0.001 mg. Use the converter above to switch between them instantly.

Micrograms to Milligrams (µg → mg) — Free Online Converter

µg → mg Reference Table

µg	mg
0.001 µg	0.000001 mg
0.002 µg	0.000002 mg
0.003 µg	0.000003 mg
0.004 µg	0.000004 mg
0.005 µg	0.000005 mg
0.006 µg	0.000006 mg
0.007 µg	0.000007 mg
0.008 µg	0.000008 mg
0.009 µg	0.000009 mg
0.01 µg	0.00001 mg
0.02 µg	0.00002 mg
0.03 µg	0.00003 mg
0.04 µg	0.00004 mg
0.05 µg	0.00005 mg
0.06 µg	0.00006 mg
0.07 µg	0.00007 mg
0.08 µg	0.00008 mg
0.09 µg	0.00009 mg
0.1 µg	0.0001 mg
0.2 µg	0.0002 mg
0.3 µg	0.0003 mg
0.4 µg	0.0004 mg
0.5 µg	0.0005 mg
0.6 µg	0.0006 mg
0.7 µg	0.0007 mg
0.8 µg	0.0008 mg
0.9 µg	0.0009 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
3.5 µg	0.0035 mg
4 µg	0.004 mg
4.5 µg	0.0045 mg
5 µg	0.005 mg
5.5 µg	0.0055 mg
6 µg	0.006 mg
6.5 µg	0.0065 mg
7 µg	0.007 mg
7.5 µg	0.0075 mg
8 µg	0.008 mg
8.5 µg	0.0085 mg
9 µg	0.009 mg
9.5 µg	0.0095 mg
10 µg	0.01 mg
11 µg	0.011 mg
12 µg	0.012 mg
13 µg	0.013 mg
14 µg	0.014 mg
15 µg	0.015 mg
16 µg	0.016 mg
17 µg	0.017 mg
18 µg	0.018 mg
19 µg	0.019 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
55 µg	0.055 mg
60 µg	0.06 mg
65 µg	0.065 mg
70 µg	0.07 mg
75 µg	0.075 mg
80 µg	0.08 mg
85 µg	0.085 mg
90 µg	0.09 mg
95 µg	0.095 mg
100 µg	0.1 mg
120 µg	0.12 mg
125 µg	0.125 mg
130 µg	0.13 mg
140 µg	0.14 mg
150 µg	0.15 mg
160 µg	0.16 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
700 µg	0.7 mg
750 µg	0.75 mg
800 µg	0.8 mg
900 µg	0.9 mg
1000 µg	1 mg
1200 µg	1.2 mg
1250 µg	1.25 mg
1500 µg	1.5 mg
1750 µg	1.75 mg
2000 µg	2 mg
2500 µg	2.5 mg
3000 µg	3 mg
4000 µg	4 mg
4500 µg	4.5 mg
5000 µg	5 mg
6000 µg	6 mg
7000 µg	7 mg
7500 µg	7.5 mg
8000 µg	8 mg
9000 µg	9 mg
10000 µg	10 mg
15000 µg	15 mg
20000 µg	20 mg
25000 µg	25 mg
50000 µg	50 mg
75000 µg	75 mg
100000 µg	100 mg

Values based on NIST SP 811 conversion factors

Why Convert Micrograms to Milligrams?

Converting between micrograms (µg) and milligrams (mg) is one of the most common mass conversions. Whether for engineering, cooking, travel, or science, knowing how to quickly convert µg to mg saves time and prevents errors.

Mass conversions from µg to mg are vital in culinary arts, logistics, and pharmaceutical industries. Professional chefs and home bakers rely on precise ingredient conversions to replicate international recipes — a slight variation in flour or leavening agents can ruin the texture of a dish. In global shipping, freight costs and vehicle load limits depend on accurate weight calculations to ensure safety and compliance with transport regulations. Furthermore, in healthcare and chemistry, dosage calculations must be exact; confusing mass units can lead to ineffective treatments or dangerous overdoses. Reliable mass conversion ensures consistency across borders and disciplines.

How to Convert Micrograms to Milligrams

To convert micrograms to milligrams, use the following formula:

mg = µg × 0.001

Example: 1 µg = 0.001 mg

For example, 5 µg = 0.005 mg, 10 µg = 0.01 mg, and 100 µg = 0.1 mg. For larger values, 1000 µg = 1 mg. Conversely, 1 mg = 1000 µg. Our calculator above performs this conversion instantly with full precision — no rounding errors.

Common Mistakes to Avoid

Mass vs Weight: confusing mass (kg) with weight/force (Newtons or lbs-force).
Ton variations: mixing up Short Ton (US), Long Ton (UK), and Metric Tonne.
Ounce confusion: confusing Ounces (weight) with Fluid Ounces (volume).

Pro Tips

Kitchen scales: Use the 'Tare' button to zero out container weight.
Water weight: 1 Liter of water weighs exactly 1 kg (at 4°C). Useful benchmark.
Conversion rule: To get kg from lbs, divide by 2.2 (approx halve it).

What is a Microgram?

A metric unit of mass equal to one millionth of a gram (1×10⁻⁶ g).

Used for trace nutrients and potent medications.

What is a Milligram?

A metric unit of mass equal to 1/1000 of a gram.

Common in medicine/pharmacy for dosage.

Micrograms → Milligrams

Micrograms to Milligrams Formula