oz to gr
Convert Ounce to Grain
Convert Ounce to Grain instantly with the tool above. The conversion factor is 437.5, meaning 1 ounce equals 437.5 grains. Type any value and the result updates immediately — no ads, no page reloads, no clutter.
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1 Ounce = 437.5 grains
1 Grain = 0.00228571 ounces
Quick reference
Common ounces converted to grains at a glance.
| oz | gr |
|---|---|
| 1 | 437.5 |
| 2 | 875 |
| 5 | 2,187.5 |
| 10 | 4,375 |
| 25 | 10,937.5 |
| 50 | 21,875 |
| 100 | 43,750 |
| 500 | 218,750 |
| 1,000 | 437,500 |
How to convert ounces to grains
To convert a value from ounces to grains, multiply the ounce value by 437.5 grains. For example, 10 ounces × that factor = 4,375 grains.
This ounce to grain converter runs entirely in your browser, so results appear instantly with no page reload, no advertisements and no sign-up.
Frequently asked questions
How many grains are in 1 ounce?+
1 ounce is equal to 437.5 grains.
How do you convert ounces to grains?+
To convert ounces to grains, multiply the ounce value by 437.5. For example, 10 ounces × 437.5 = 4,375 grains.
What is the formula to convert ounces to grains?+
Ounce → Grain: value × 437.5. Equivalently, 1 ounce = 437.5 grains.
Is this Ounce to Grain converter free to use?+
Yes. This ounce to grain converter is completely free, works instantly in your browser, and contains no advertisements, popups or sign-up.