Grains to Ounces (gr to oz) Converter

How to convert grains to ounces

Formulaoz = gr × 0.002285714286

Because one ounce equals 437.5 grains, you can also divide: oz = gr ÷ 437.5.

A grain is smaller than an ounce: it takes 437.5 grains to make one ounce.

Worked examples

1 grain1 gr × 0.002285714286 = 0.002285714286 oz
5 grains5 gr × 0.002285714286 = 0.01142857143 oz
10 grains10 gr × 0.002285714286 = 0.02285714286 oz
20 grains20 gr × 0.002285714286 = 0.04571428571 oz
100 grains100 gr × 0.002285714286 = 0.2285714286 oz

Grains to ounces conversion table

Values are calculated by the conversion engine and rounded to 8 significant figures.

Grains to ounces: 0.1–10 gr
Grains (gr)	Ounces (oz)
0.1 gr	0.00022857143 oz
0.25 gr	0.00057142857 oz
0.5 gr	0.0011428571 oz
1 gr	0.0022857143 oz
2 gr	0.0045714286 oz
3 gr	0.0068571429 oz
4 gr	0.0091428571 oz
5 gr	0.011428571 oz
6 gr	0.013714286 oz
7 gr	0.016 oz
8 gr	0.018285714 oz
9 gr	0.020571429 oz
10 gr	0.022857143 oz

Grains to ounces: 12–1,000 gr
Grains (gr)	Ounces (oz)
12 gr	0.027428571 oz
15 gr	0.034285714 oz
20 gr	0.045714286 oz
25 gr	0.057142857 oz
30 gr	0.068571429 oz
40 gr	0.091428571 oz
50 gr	0.11428571 oz
75 gr	0.17142857 oz
100 gr	0.22857143 oz
250 gr	0.57142857 oz
500 gr	1.1428571 oz
1,000 gr	2.2857143 oz

About the units

Grain (gr)

Exactly 64.79891 mg; 7,000 grains make a pound. Used for bullets, arrows and some medicines. One grain equals 0.00006479891 kilograms (kg).

Ounce (oz)

One sixteenth of a pound: exactly 28.349523125 g. Not to be confused with the fluid ounce (volume) or the troy ounce used for precious metals. One ounce equals 0.02834952313 kilograms (kg).

Frequently asked questions

How many ounces are in one grain?

There are 0.002285714286 ounces in one grain, and this value is exact by definition.

How do I convert grains to ounces?

Multiply the number of grains by 0.002285714286. For example, 10 gr × 0.002285714286 = 0.02285714286 oz.

How many grains are in one ounce?

One ounce equals 437.5 grains. That is the reverse factor, 1 ÷ 0.002285714286.

What is 10 grains in ounces?

10 gr = 0.02285714286 oz.

Is this gr to oz converter accurate?

Yes. Both units are defined exactly in terms of SI units, so the conversion factor is exact; results are shown to 12 significant figures by default and you can change precision in the converter. Calculations run in your browser using the same tested engine that generated this page.

Grains to Ounces Converter