Grams to Milligrams Conversion

How many mg in a gram?

There are 1000 mg in a gram (1 g = 1000 mg).

To find out how many milligrams in "x" grams or grams in "x" milligrams, enter a gram or a milligram value into the converter and the result will be displayed.

Round:
Enter Gram
Enter Milligram (mg)

Grams and milligrams (g to mg) mass units conversion factor is 1000. To find out how many milligrams in grams, multiply the gram value by 1000 or use the converter.

1 Gram = 1000 Milligrams

Gram and milligram are units of mass in metric system. In metric system, the prefix "milli" means "one thousandth of". If you replace "milli" with "1000", that makes 1 miiligram is "1000th" of a gram (1000 mg in a gram).

For example, to find out how many milligrams in a half gram, multiply the gram value by the conversion factor, 1/2 g * 1000 (mg in 1 g) = 500 mg in 1/2 gram.

Gram is a metric system unit of mass. It is one thousandth (1/1000) of a kilogram which is the metric system base unit. 1 grams equals to the mass of 1 mL (or 1 cubic centimeter) of water. The abbreviation for gram is "g".

Milligram is a unit of mass in metric system and it is mostly used in medicine and pharmacy. There are 1 000 000 (one million) mg in 1 kg (1000 grams in 1 kg * 1000 mg in 1 gram = 1 000 000). The abbreviation for milligram is "mg".

Create Custom Conversion Table
To create your own custom conversion table click "Create Table" botton. To change values, you may enter a "Start" value (1, 2.5, 5 etc), select a an "Increment" value (0.01, 5, 100 etc) and select an "Accuracy" value to round the result.