Grams to Milligrams Converter
Convert grams to milligrams instantly: mg = g × 1000. Free g to mg calculator for medication dosing, nutrition labels, lab work and cooking with decimal precision.
All weight units in one place — try the unified converter→How to convert grams to milligrams?
To convert grams to milligrams, you can use the following conversion factor: **1 gram = 1000 milligrams**, multiply the number of grams by 1000.
m(mg) = m(g) × 1000
Example
Convert 1 g to milligrams:
m(mg) = 1g × 1000 = 1000mg
How many milligrams in a gram?
There are 1000 milligrams in one gram.
1g = 1000mg
1g = 1000mg
How many grams in a milligram?
There are 0.001 grams in one milligram.
1mg = 0.001g
1mg = 0.001g

What is a Gram?
A gram is a unit of mass in the metric system. It is equal to one thousandth of a kilogram. Grams are commonly used for measuring small quantities of ingredients in cooking, medication dosages, and other precise measurements.
What is a Milligram?
A milligram is a unit of mass in the metric system. It is equal to one thousandth of a gram or one millionth of a kilogram. Milligrams are commonly used for measuring very small quantities, such as medication dosages, chemical concentrations, and nutritional values.
Popular grams to milligrams conversion table
| Grams (g) | Milligrams (mg) |
|---|---|
| 0.001 g | 1 mg |
| 0.01 g | 10 mg |
| 0.1 g | 100 mg |
| 0.5 g | 500 mg |
| 1 g | 1000 mg |
| 2 g | 2000 mg |
| 5 g | 5000 mg |
| 10 g | 10000 mg |
| 25 g | 25000 mg |
| 50 g | 50000 mg |
| 100 g | 100000 mg |
