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Convert grams to milligrams

Convert grams (g) to milligrams (mg). 1 g = 1,000 mg, and 1 mg = 0.001 g.

1 g = 1,000 mg

Grams to MG formula

mg = g × 1,000

Multiply the number of grams by 1,000.

Example: To convert 1 g to milligrams: 1 × 1,000 = 1,000 mg.

Quick answers

What is 1 g in milligrams?
1 g = 1,000 mg
What is 100 g in milligrams?
100 g = 100,000 mg
What is 250 g in milligrams?
250 g = 250,000 mg
What is 500 g in milligrams?
500 g = 500,000 mg

Grams to MG conversion table

MG to Grams table
grams (g)milligrams (mg)
1 g1,000 mg
5 g5,000 mg
10 g10,000 mg
25 g25,000 mg
50 g50,000 mg
100 g100,000 mg
125 g125,000 mg
150 g150,000 mg
200 g200,000 mg
250 g250,000 mg
300 g300,000 mg
400 g400,000 mg
454 g454,000 mg
500 g500,000 mg
750 g750,000 mg
1,000 g1,000,000 mg

Frequently asked questions

How many milligrams are in a gram?

There are 1,000 milligrams in a gram (1 g = 1,000 mg).

How do I convert grams to milligrams?

Multiply the number of grams by 1,000. To convert 1 g to milligrams: 1 × 1,000 = 1,000 mg.

Is the Grams to MG conversion exact?

Yes. Both units are defined exactly, so 1 gram is exactly 1,000 milligrams. Results on this page are rounded to six significant digits; pick more decimals in the converter if you need them.

What is 1 g in milligrams?

1 g = 1,000 mg.

How do I convert milligrams back to grams?

Use the reverse relationship: 1 mg = 0.001 g. The MG to Grams page has a converter and a full table.

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