Ounce to Grain calculator (oz to gr)

Convert ounces to grains (oz to gr) by typing the amount of ounces in the input field below and then clicking in the "Convert" button. If you want to convert from grains to ounces, you can use our grain to ounce converter.


Formula used to convert oz to gr:

F(x) = x * 437.5

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

1 oz = 1 * 437.5 = 437.5 gr


  1. Multiply the amount of ounces by 437.5.
  2. The result will be expressed in grains.

Ounce to Grain Conversion Table

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

Ounces (oz) Grains (gr)
0.001 oz 0.4375 gr
0.01 oz 4.375 gr
0.1 oz 43.75 gr
1 oz 437.5 gr
2 oz 875 gr
3 oz 1312.5 gr
4 oz 1750 gr
5 oz 2187.5 gr
6 oz 2625 gr
7 oz 3062.5 gr
8 oz 3500 gr
9 oz 3937.5 gr
10 oz 4375 gr
20 oz 8750 gr
30 oz 13125 gr
40 oz 17500 gr
50 oz 21875 gr
60 oz 26250 gr
70 oz 30625 gr
80 oz 35000 gr
90 oz 39375 gr
100 oz 43750 gr

About Ounces (oz)

The ounce (symbol ℥) is a unit of mass, weight, or volume used in most British derived customary systems of measurement. One avoirdupois ounce is equal to ​1⁄16 of a common avoirdupois pound. It is commonly used in the United States to measure the weight of food, postal items, gloves, among others.

There are many ounces in current use. This are the troy ounce, the ounce-force and the fluid ounce.

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.

FAQs for Ounce to Grain converter calculator

What is Ounce to Grain converter calculator?

Ounce to Grain converter is a free and online calculator that converts Ounces to Grains.

How do I use Ounce to Grain converter?

You just have to insert the amount of Ounces you want to convert and press the "Convert" button. The amount of Grains 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 Ounce to Grain converter work on?

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