Convert Gram to Milligram (g to mg)

1 g = 1,000 mg

How to convert grams to milligrams

To convert grams to milligrams, multiply grams by 1,000

To convert milligrams to grams, divide milligrams by 1,000

Common gram to milligram examples

Gram (g) Milligram (mg)
1 g 1,000 mg
10 g 10,000 mg
50 g 50,000 mg
100 g 100,000 mg
250 g 250,000 mg
500 g 500,000 mg
1,000 g 1,000,000 mg
10,000 g 10,000,000 mg
100,000 g 100,000,000 mg
1,000,000 g 1,000,000,000 mg

Frequently asked questions

How many milligrams are in 100 grams?

100 g equals about 100,000 mg.

What is the grams to milligrams formula?

Use milligrams = grams × 1,000. For reverse conversion, grams = milligrams × 0.001.

Can I convert milligrams to grams too?

Yes. The calculator supports two-way conversion. Edit either field and the other updates instantly.

Is this conversion exact?

The converter uses fixed unit factors. Display values are rounded for readability.