How many micrograms are in 1 milligram?

1 mg equals 1000 µg. This is an exact conversion factor defined by NIST.

How do I convert milligrams to micrograms?

Multiply the value in mg by the conversion factor. For example, 10 mg = 10000 µg. Use our calculator above for instant results.

Is the milligrams to micrograms conversion exact?

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

Can I convert milligrams to micrograms 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 milligrams and micrograms?

Milligrams (mg) and Micrograms (µg) are both units of mass but belong to different measurement systems. 1 mg = 1000 µg. Use the converter above to switch between them instantly.

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

mg → µg Reference Table

mg	µg
0.001 mg	1 µg
0.002 mg	2 µg
0.003 mg	3 µg
0.004 mg	4 µg
0.005 mg	5 µg
0.006 mg	6 µg
0.007 mg	7 µg
0.008 mg	8 µg
0.009 mg	9 µg
0.01 mg	10 µg
0.02 mg	20 µg
0.03 mg	30 µg
0.04 mg	40 µg
0.05 mg	50 µg
0.06 mg	60 µg
0.07 mg	70 µg
0.08 mg	80 µg
0.09 mg	90 µg
0.1 mg	100 µg
0.2 mg	200 µg
0.3 mg	300 µg
0.4 mg	400 µg
0.5 mg	500 µg
0.6 mg	600 µg
0.7 mg	700 µg
0.8 mg	800 µg
0.9 mg	900 µg
1 mg	1000 µg
1.5 mg	1500 µg
2 mg	2000 µg
2.5 mg	2500 µg
3 mg	3000 µg
3.5 mg	3500 µg
4 mg	4000 µg
4.5 mg	4500 µg
5 mg	5000 µg
5.5 mg	5500 µg
6 mg	6000 µg
6.5 mg	6500 µg
7 mg	7000 µg
7.5 mg	7500 µg
8 mg	8000 µg
8.5 mg	8500 µg
9 mg	9000 µg
9.5 mg	9500 µg
10 mg	10000 µg
11 mg	11000 µg
12 mg	12000 µg
13 mg	13000 µg
14 mg	14000 µg
15 mg	15000 µg
16 mg	16000 µg
17 mg	17000 µg
18 mg	18000 µg
19 mg	19000 µg
20 mg	20000 µg
25 mg	25000 µg
30 mg	30000 µg
35 mg	35000 µg
40 mg	40000 µg
45 mg	45000 µg
50 mg	50000 µg
55 mg	55000 µg
60 mg	60000 µg
65 mg	65000 µg
70 mg	70000 µg
75 mg	75000 µg
80 mg	80000 µg
85 mg	85000 µg
90 mg	90000 µg
95 mg	95000 µg
100 mg	100000 µg
120 mg	120000 µg
125 mg	125000 µg
130 mg	130000 µg
140 mg	140000 µg
150 mg	150000 µg
160 mg	160000 µg
175 mg	175000 µg
180 mg	180000 µg
200 mg	200000 µg
225 mg	225000 µg
250 mg	250000 µg
275 mg	275000 µg
300 mg	300000 µg
350 mg	350000 µg
400 mg	400000 µg
450 mg	450000 µg
500 mg	500000 µg
600 mg	600000 µg
700 mg	700000 µg
750 mg	750000 µg
800 mg	800000 µg
900 mg	900000 µg
1000 mg	1000000 µg
1200 mg	1200000 µg
1250 mg	1250000 µg
1500 mg	1500000 µg
1750 mg	1750000 µg
2000 mg	2000000 µg
2500 mg	2500000 µg
3000 mg	3000000 µg
4000 mg	4000000 µg
4500 mg	4500000 µg
5000 mg	5000000 µg
6000 mg	6000000 µg
7000 mg	7000000 µg
7500 mg	7500000 µg
8000 mg	8000000 µg
9000 mg	9000000 µg
10000 mg	10000000 µg
15000 mg	15000000 µg
20000 mg	20000000 µg
25000 mg	25000000 µg
50000 mg	50000000 µg
75000 mg	75000000 µg
100000 mg	100000000 µg

Values based on NIST SP 811 conversion factors

Why Convert Milligrams to Micrograms?

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

Mass conversions from mg to µg 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 Milligrams to Micrograms

To convert milligrams to micrograms, use the following formula:

µg = mg × 1000

Example: 1 mg = 1000 µg

For example, 5 mg = 5000 µg, 10 mg = 10000 µg, and 100 mg = 100000 µg. For larger values, 1000 mg = 1000000 µg. Conversely, 1 µg = 0.001 mg. 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 Milligram?

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

Common in medicine/pharmacy for dosage.

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.

Milligrams → Micrograms

Milligrams to Micrograms Formula