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Ounce to Grain
Convert Ounce to Grain and get the exact value instantly.
1 oz = 437.5 gr
About this conversion
To convert Ounce to Grain, multiply the number of Ounce by 437.5.
Weight units split between the metric world (grams, kilograms) and imperial habits (pounds, ounces, stones), which is why shipping labels, recipes and gym plates rarely line up without a conversion.
Conversion table
| Ounce (oz) | Grain (gr) |
|---|---|
| 1 oz | 437.5 gr |
| 2 oz | 875 gr |
| 5 oz | 2187.5 gr |
| 10 oz | 4375 gr |
| 100 oz | 43750 gr |
How to use this converter
- Enter your Ounce value
Type any number into the Ounce field. It starts at 1 so you can read the rate straight away.
- Read the Grain result
The amount in Grain updates as you type, so there is no button to press and nothing to wait for.
- Swap or keep exploring
Use the swap control to flip the direction, or pick a related conversion from the list below.
Frequently asked
- How many Grain are in one Ounce?
- One Ounce equals 437.5 gr. Enter any amount above to get an exact figure for your own value.
- Is this converter accurate?
- Yes. It uses the exact international definition of each unit and computes on your device, so the only rounding is for display.
- Do you upload the numbers I enter?
- No. The Ounce to Grain conversion runs entirely in your browser tab, and nothing you type is sent to a server.
- Does it work on my phone?
- Yes. It runs in any modern mobile browser and keeps working offline once the page has loaded.
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