Grams to Mg Converter

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

1,000
Milligram (mg)
Input Value
1 g (Gram)
1/1000 of a kilogram. Common for food, cooking, and small items.

How to Convert Gram to Milligram

Simple formula with a worked example

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

mg = g × 1000

Example: Convert 5 g to mg

5 g = 5,000 mg

To convert back, use: g = mg ÷ 1000

Gram to Milligram Conversion Table

Quick reference for common gram to milligram conversions

Gram (g)Milligram (mg)
0.001 g1 mg
0.01 g10 mg
0.1 g100 mg
0.5 g500 mg
1 g1,000 mg
2 g2,000 mg
5 g5,000 mg
10 g10,000 mg
50 g50,000 mg
100 g100,000 mg

About Gram and Milligram

Understanding these weight units

Gram (g)

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

Milligram (mg)

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

When You Need This Conversion

  • medication dosage
  • supplement intake
  • lab measurements
  • chemical formulations

Frequently Asked Questions

Common questions about converting gram to milligram

Embed Grams to Mg Converter

Add this calculator to your website or blog for free.

Last updated Mar 21, 2026