Ounces to Grains
Convert ounces (oz) to grains (gr). Type in either box; the other updates as you go.
How to convert ounces to grains
To convert ounces to grains, multiply the number of ounces by 437.5.
Example
Convert 5 ounces to grains:
Ounce to grain conversion chart
| Ounces (oz) | Grains (gr) |
|---|---|
| 1 oz | 437.5 gr |
| 2 oz | 875 gr |
| 3 oz | 1,312.5 gr |
| 4 oz | 1,750 gr |
| 5 oz | 2,187.5 gr |
| 6 oz | 2,625 gr |
| 7 oz | 3,062.5 gr |
| 8 oz | 3,500 gr |
| 9 oz | 3,937.5 gr |
| 10 oz | 4,375 gr |
| 12 oz | 5,250 gr |
| 15 oz | 6,562.5 gr |
| 20 oz | 8,750 gr |
| 25 oz | 10,937.5 gr |
| 30 oz | 13,125 gr |
| 40 oz | 17,500 gr |
| 50 oz | 21,875 gr |
| 60 oz | 26,250 gr |
| 70 oz | 30,625 gr |
| 75 oz | 32,812.5 gr |
| 80 oz | 35,000 gr |
| 90 oz | 39,375 gr |
| 100 oz | 43,750 gr |
| 150 oz | 65,625 gr |
| 200 oz | 87,500 gr |
| 250 oz | 109,375 gr |
| 500 oz | 218,750 gr |
| 1,000 oz | 437,500 gr |
Going the other way? See the grains to ounces chart.
About the units
Ounce (oz)
An avoirdupois ounce is one sixteenth of a pound, or 28.349523125 grams. Not to be confused with the fluid ounce, which measures volume.
Grain (gr)
A grain is exactly 64.79891 milligrams. There are 7,000 grains in a pound; it is used for bullets, arrows and some medicines.
Frequently asked questions
How many grains are in an ounce?
There are 437.5 grains in an ounce.
How many ounces are in a grain?
There are 0.002285714286 ounces in a grain.
How do you convert ounces to grains?
To convert ounces to grains, multiply the number of ounces by 437.5.
What is 5 ounces in grains?
5 ounces equals 2,187.5 grains.
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