Convert grams to milligrams
Enter a grams value below and convert to milligrams
g
1 gram =
1000 milligrams
* exact result
Select how many decimal places the result will be rounded to:
How to convert grams to milligrams
To convert grams to milligrams, multiply a grams value by 1000.
Formula mg = g × 1000
Example: Convert 5 grams to milligrams Calculations: 5 g × 1000 = 5000 mg
Gram (g)
The gram is the universal unit of mass, defined as the mass of one cubic centimeter of water at its maximum density. It is equal to 1/1000 of a kilogram, or about 0.035274 ounces.
Milligram (mg)
The milligram is the unit of mass, commonly used to measure light weights. It is equal to 1/1000 of a gram, or about 0.000035274 ounces.