How many grams are in 1 milligram?

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

How do I convert milligrams to grams?

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

Is the milligrams to grams conversion exact?

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

Can I convert milligrams to grams 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 grams?

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

Milligrams to Grams (mg → g) — Free Online Converter

mg → g Reference Table

mg	g
0.001 mg	0.000001 g
0.002 mg	0.000002 g
0.003 mg	0.000003 g
0.004 mg	0.000004 g
0.005 mg	0.000005 g
0.006 mg	0.000006 g
0.007 mg	0.000007 g
0.008 mg	0.000008 g
0.009 mg	0.000009 g
0.01 mg	0.00001 g
0.02 mg	0.00002 g
0.03 mg	0.00003 g
0.04 mg	0.00004 g
0.05 mg	0.00005 g
0.06 mg	0.00006 g
0.07 mg	0.00007 g
0.08 mg	0.00008 g
0.09 mg	0.00009 g
0.1 mg	0.0001 g
0.2 mg	0.0002 g
0.3 mg	0.0003 g
0.4 mg	0.0004 g
0.5 mg	0.0005 g
0.6 mg	0.0006 g
0.7 mg	0.0007 g
0.8 mg	0.0008 g
0.9 mg	0.0009 g
1 mg	0.001 g
1.5 mg	0.0015 g
2 mg	0.002 g
2.5 mg	0.0025 g
3 mg	0.003 g
3.5 mg	0.0035 g
4 mg	0.004 g
4.5 mg	0.0045 g
5 mg	0.005 g
5.5 mg	0.0055 g
6 mg	0.006 g
6.5 mg	0.0065 g
7 mg	0.007 g
7.5 mg	0.0075 g
8 mg	0.008 g
8.5 mg	0.0085 g
9 mg	0.009 g
9.5 mg	0.0095 g
10 mg	0.01 g
11 mg	0.011 g
12 mg	0.012 g
13 mg	0.013 g
14 mg	0.014 g
15 mg	0.015 g
16 mg	0.016 g
17 mg	0.017 g
18 mg	0.018 g
19 mg	0.019 g
20 mg	0.02 g
25 mg	0.025 g
30 mg	0.03 g
35 mg	0.035 g
40 mg	0.04 g
45 mg	0.045 g
50 mg	0.05 g
55 mg	0.055 g
60 mg	0.06 g
65 mg	0.065 g
70 mg	0.07 g
75 mg	0.075 g
80 mg	0.08 g
85 mg	0.085 g
90 mg	0.09 g
95 mg	0.095 g
100 mg	0.1 g
120 mg	0.12 g
125 mg	0.125 g
130 mg	0.13 g
140 mg	0.14 g
150 mg	0.15 g
160 mg	0.16 g
175 mg	0.175 g
180 mg	0.18 g
200 mg	0.2 g
225 mg	0.225 g
250 mg	0.25 g
275 mg	0.275 g
300 mg	0.3 g
350 mg	0.35 g
400 mg	0.4 g
450 mg	0.45 g
500 mg	0.5 g
600 mg	0.6 g
700 mg	0.7 g
750 mg	0.75 g
800 mg	0.8 g
900 mg	0.9 g
1000 mg	1 g
1200 mg	1.2 g
1250 mg	1.25 g
1500 mg	1.5 g
1750 mg	1.75 g
2000 mg	2 g
2500 mg	2.5 g
3000 mg	3 g
4000 mg	4 g
4500 mg	4.5 g
5000 mg	5 g
6000 mg	6 g
7000 mg	7 g
7500 mg	7.5 g
8000 mg	8 g
9000 mg	9 g
10000 mg	10 g
15000 mg	15 g
20000 mg	20 g
25000 mg	25 g
50000 mg	50 g
75000 mg	75 g
100000 mg	100 g

Values based on NIST SP 811 conversion factors

Why Convert Milligrams to Grams?

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

Mass conversions from mg to g 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 Grams

To convert milligrams to grams, use the following formula:

g = mg × 0.001

Example: 1 mg = 0.001 g

For example, 5 mg = 0.005 g, 10 mg = 0.01 g, and 100 mg = 0.1 g. For larger values, 1000 mg = 1 g. Conversely, 1 g = 1000 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 Gram?

The gram (g) is a metric unit of mass equal to one-thousandth of a kilogram (0.001 kg). Originally defined as the mass of one cubic centimeter of water at 4°C.

Grams are widely used for small weights in cooking (ingredients), nutrition facts, chemistry, and postal services worldwide.

Milligrams → Grams

Milligrams to Grams Formula