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Convert milligrams to grams

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

100 mg = 0.1 g

MG to Grams formula

g = mg × 0.001

Multiply the number of milligrams by 0.001.

Example: To convert 100 mg to grams: 100 × 0.001 = 0.1 g.

Quick answers

What is 100 mg in grams?
100 mg = 0.1 g
What is 250 mg in grams?
250 mg = 0.25 g
What is 500 mg in grams?
500 mg = 0.5 g
What is 1,000 mg in grams?
1,000 mg = 1 g

MG to Grams conversion table

Grams to MG table
milligrams (mg)grams (g)
1 mg0.001 g
5 mg0.005 g
10 mg0.01 g
25 mg0.025 g
50 mg0.05 g
100 mg0.1 g
200 mg0.2 g
250 mg0.25 g
300 mg0.3 g
400 mg0.4 g
500 mg0.5 g
750 mg0.75 g
1,000 mg1 g
1,500 mg1.5 g
2,000 mg2 g
5,000 mg5 g

Frequently asked questions

How many milligrams are in a gram?

There are 1,000 milligrams in a gram (1 g = 1,000 mg), so 1 mg = 0.001 g.

How do I convert milligrams to grams?

Multiply the number of milligrams by 0.001. To convert 100 mg to grams: 100 × 0.001 = 0.1 g.

Is the MG to Grams conversion exact?

Yes. Both units are defined exactly, so 1 milligram is exactly 0.001 grams. Results on this page are rounded to six significant digits; pick more decimals in the converter if you need them.

What is 100 mg in grams?

100 mg = 0.1 g.

How do I convert grams back to milligrams?

Use the reverse relationship: 1 g = 1,000 mg. The Grams to MG page has a converter and a full table.

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