Grains (gr) to Milligrams (mg) calculator

Input the amount of grains you want to convert to milligrams in the below input field, and then click in the "Convert" button. But if you want to convert from milligrams to grains, please checkout this tool.


Formula used to convert gr to mg:

F(x) = x * 64.79891

For example, if you want to convert 15 gr to mg, just replace x by 15 [gr]:

15 gr = 15*64.79891 = 971.9836500000001 mg


  1. Multiply the amount of grains by 64.79891.
  2. The result will be expressed in milligrams.

Grain to Milligram Conversion Table

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

Grains (gr) Milligrams (mg)
0.001 gr 0.06479891 mg
0.01 gr 0.6479891 mg
0.1 gr 6.479891 mg
1 gr 64.79891 mg
2 gr 129.59782 mg
3 gr 194.39673 mg
4 gr 259.19564 mg
5 gr 323.99455 mg
6 gr 388.79346 mg
7 gr 453.59237 mg
8 gr 518.39128 mg
9 gr 583.19019 mg
10 gr 647.9891 mg
20 gr 1295.9782 mg
30 gr 1943.9673 mg
40 gr 2591.9564 mg
50 gr 3239.9455 mg
60 gr 3887.9346 mg
70 gr 4535.9237 mg
80 gr 5183.9128 mg
90 gr 5831.9019 mg
100 gr 6479.891 mg

About Grains (gr)

A grain is a unit of mass, equal to exactly 64.79891 milligrams (independently of the type of pound used). It is nominally based upon the mass of a single virtual ideal seed of a cereal. The symbol used to define grains is gr.

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.

See also

FAQs for Grain to Milligram calculator

What is Grain to Milligram calculator?

Grain to Milligram is a free and online calculator that converts Grains to Milligrams.

How do I use Grain to Milligram?

You just have to insert the amount of Grains you want to convert and press the "Convert" button. The amount of Milligrams will be outputed in the input field below the button.

Which browsers are supported?

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

Which devices does Grain to Milligram work on?

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