Grams to Milligrams

Convert grams to milligrams. Live result, plus a quick-reference table for common values.

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⇆ Convert Milligrams to Grams instead

Frequently asked questions

How do I convert grams to milligrams?

Multiply the gram value by 1000. So 1 gram = 1000 mg, and the calculator above does it instantly for any number.

How many milligrams are in a gram?

There are 1000 milligrams in one gram. The reference table shows the conversion for common values.

Is this g to mg converter free?

Yes, completely free, no sign-up, and it runs entirely in your browser, so nothing is uploaded.