Convert Grams to Milligrams

Enter the weight in grams below to get the value converted to milligrams.

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1 g = 1,000 mg
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How to Convert Grams to Milligrams

conversion scale showing grams and equivalent milligrams weight values

To convert a gram measurement to a milligram measurement, multiply the weight by the conversion ratio. One gram is equal to 1,000 milligrams, so use this simple formula to convert:

milligrams = grams × 1,000

The weight in milligrams is equal to the grams multiplied by 1,000.

For example, here's how to convert 5 grams to milligrams using the formula above.
5 g = (5 × 1,000) = 5,000 mg

Grams and milligrams are both units used to measure weight. Keep reading to learn more about each unit of measure.

Grams

A gram is the mass/weight equal to 1/1,000 of a kilogram, and is roughly equal to the mass of one cubic centimeter of water.

The gram, or gramme, is an SI unit of weight in the metric system. Grams can be abbreviated as g, for example 1 gram can be written as 1 g.

Milligrams

The milligram is the mass equal to 1/1,000 of a gram, or 0.0154 grains.

The milligram, or milligramme, is an SI unit of weight in the metric system. In the metric system, "milli" is the prefix for 10-3. Milligrams can be abbreviated as mg, for example 1 milligram can be written as 1 mg.

Gram Measurements and Equivalent Milligram Conversions

Common gram values converted to the equivalent milligram value
Grams Milligrams
1 g 1,000 mg
2 g 2,000 mg
3 g 3,000 mg
4 g 4,000 mg
5 g 5,000 mg
6 g 6,000 mg
7 g 7,000 mg
8 g 8,000 mg
9 g 9,000 mg
10 g 10,000 mg
11 g 11,000 mg
12 g 12,000 mg
13 g 13,000 mg
14 g 14,000 mg
15 g 15,000 mg
16 g 16,000 mg
17 g 17,000 mg
18 g 18,000 mg
19 g 19,000 mg
20 g 20,000 mg
21 g 21,000 mg
22 g 22,000 mg
23 g 23,000 mg
24 g 24,000 mg
25 g 25,000 mg
26 g 26,000 mg
27 g 27,000 mg
28 g 28,000 mg
29 g 29,000 mg
30 g 30,000 mg
31 g 31,000 mg
32 g 32,000 mg
33 g 33,000 mg
34 g 34,000 mg
35 g 35,000 mg
36 g 36,000 mg
37 g 37,000 mg
38 g 38,000 mg
39 g 39,000 mg
40 g 40,000 mg

More Gram Weight Conversions

US Customary & Imperial Units
Convert to Tons
1 g is equal to 1.1023E-6 tons
Convert to Pounds
1 g is equal to 0.002205 pounds
Convert to Ounces
1 g is equal to 0.035274 ounces
SI Units
Convert to Metric Tons
1 g is equal to 1.0E-6 metric tons
Convert to Kilograms
1 g is equal to 0.001 kilograms
Other Units
Convert to Long Tons
1 g is equal to 9.8421E-7 long tons
Convert to Carats
1 g is equal to 5 carats