Gram to Milligram calculator (g to mg)

Convert grams to milligrams (g to mg) by typing the amount of grams in the input field below and then clicking in the "Convert" button. If you want to convert from milligrams to grams, you can use our milligram to gram converter.


Formula used to convert g to mg:

F(x) = x * 1000

For example, if you want to convert 1 g to mg, just replace x by 1 [g]:

1 g = 1 * 1000 = 1000 mg


  1. Multiply the amount of grams by 1000.
  2. The result will be expressed in milligrams.

Gram to Milligram Conversion Table

The following table will show the most common conversions for Grams (g) to Milligrams (mg):

Grams (g) Milligrams (mg)
0.0001 g 0.1 mg
0.001 g 1 mg
0.01 g 10 mg
0.02 g 20 mg
0.03 g 30 mg
0.04 g 40 mg
0.05 g 50 mg
0.06 g 60 mg
0.07 g 70 mg
0.08 g 80 mg
0.09 g 90 mg
0.1 g 100 mg
0.2 g 200 mg
0.3 g 300 mg
0.4 g 400 mg
0.5 g 500 mg
0.6 g 600 mg
0.7 g 700 mg
0.8 g 800 mg
0.9 g 900 mg
1 g 1000 mg
1.1 g 1100 mg
1.2 g 1200 mg
1.25 g 1250 mg
1.5 g 1500 mg
1.75 g 1750 mg
2 g 2000 mg
3 g 3000 mg
4 g 4000 mg
5 g 5000 mg
6 g 6000 mg
7 g 7000 mg
8 g 8000 mg
9 g 9000 mg
10 g 10000 mg
20 g 20000 mg
30 g 30000 mg
40 g 40000 mg
50 g 50000 mg
60 g 60000 mg
70 g 70000 mg
80 g 80000 mg
90 g 90000 mg
100 g 100000 mg
200 g 200000 mg
300 g 300000 mg
400 g 400000 mg
500 g 500000 mg
600 g 600000 mg
700 g 700000 mg
800 g 800000 mg
900 g 900000 mg
1000 g 1000000 mg

About the converter

Note that this is a high-precision g to mg calculator, but rounding errors may occur (in a very small percentage of the cases).

Convert grams to milligrams (g to mg) by pasting or typing the amount of grams in the grams input. Check the formula section to manually convert g to mg.

In case you want to convert milligrams to grams, please use the mg to g converter.

How many milligrams are in a gram?

1 gram [g] is equal to 1000 milligrams [mg].

About Grams (g)

A gram is a unit of mass defined in the International System of Units (SI). It is based on the kilogram (the SI base unit of mass). The symbol used to represent the gram is g and represents one thousandth of a kilogram (1/1,000 kilogram).

About Milligrams (mg)

A milligram is a unit of weight that is based on the International System of Units. The symbol used to represent the milligram is mg. One milligram is equal to 1/1,000 grams, or 1/1,000,000 kilograms. Is often used to measure weight or mass of food, vitamins, minerals and more.

FAQs for Gram to Milligram converter calculator

What is Gram to Milligram converter calculator?

Gram to Milligram converter is a free and online calculator that converts Grams to Milligrams.

How do I use Gram to Milligram converter?

  1. Either copy and paste or type the amount of grams to convert in the grams input.
  2. Click on the Convert button.
  3. It will convert grams into milligrams and output it in the milligrams input.

Which browsers are supported?

All mayor web browsers are supported, including Internet Explorer, Microsoft Edge, Firefox, Chrome, Safari and Opera.

Which devices does Gram to Milligram converter work on?

Gram to Milligram converter calculator works in any device that supports any of the browsers mentioned before. It can be a smartphone, desktop computer, notebook, tablet, etc.