Mg to Grams Converter

Convert milligrams to grams instantly. Free mg to g converter with quick reference table and formula. 1000 milligrams = 1 gram.

0.001
Gram (g)
Input Value
1 mg (Milligram)
1/1000 of a gram. Used in medicine and for very small quantities.

How to Convert Milligram to Gram

Simple formula with a worked example

To convert milligram (mg) to gram (g), use this formula:

g = mg ÷ 1000

Example: Convert 500 mg to g

500 mg = 0.5 g

To convert back, use: mg = g × 1000

Milligram to Gram Conversion Table

Quick reference for common milligram to gram conversions

Milligram (mg)Gram (g)
1 mg0.001 g
2 mg0.002 g
5 mg0.005 g
10 mg0.01 g
25 mg0.025 g
50 mg0.05 g
100 mg0.1 g
250 mg0.25 g
500 mg0.5 g
1,000 mg1 g

About Milligram and Gram

Understanding these weight units

Milligram (mg)

1/1000 of a gram. Used in medicine and for very small quantities.

Gram (g)

1/1000 of a kilogram. Common for food, cooking, and small items.

When You Need This Conversion

  • medication conversion
  • supplement labels
  • nutrition data
  • scientific research

Frequently Asked Questions

Common questions about converting milligram to gram

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Last updated Mar 21, 2026