Grams to Milligrams Converter (g to mg)

1 g = 1000 mg

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Formula

To convert grams to milligrams, multiply the value by 1000.

mg = g × 1000

Example calculation

Convert 5 g to mg:

5 g × 1000 = 5000 mg

Conversion table

grams → milligrams
gmg
11000.0000
22000.0000
33000.0000
44000.0000
55000.0000
66000.0000
77000.0000
88000.0000
99000.0000
1010000.0000
1515000.0000
2020000.0000
2525000.0000
3030000.0000
3535000.0000
4040000.0000
4545000.0000
5050000.0000
5555000.0000
6060000.0000
6565000.0000
7070000.0000
7575000.0000
8080000.0000
8585000.0000
9090000.0000
9595000.0000
100100000.0000
200200000.0000
500500000.0000
10001000000.0000
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About the units

Gram (g)
Common for food, recipes and small items in metric countries. One thousandth of a kilogram.
Milligram (mg)
Used for medicine doses and nutrition labels worldwide. One thousandth of a gram.

Frequently asked questions

How do I convert grams to milligrams?
To convert grams to milligrams, multiply the value by 1000.
How many milligrams are in 1 gram?
1 gram equals 1000 mg.
How many milligrams are in 10 grams?
10 g equals 10000 mg.
How do I convert milligrams back to grams?
Use the reverse converter: 1 milligram equals 0.001 g.
Is this converter accurate?
Yes. It uses the exact SI/NIST definitions of each unit and shows up to 6 significant digits.

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