A grain is exactly 64.79891 milligrams.
Grains to Ounces
Convert grains (gr) to ounces (oz) instantly. Free online weight converter with formulas, tables and examples.
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An avoirdupois ounce is 1/16 pound.
oz = gr × 0.00228571428571
Results update instantly for Grains to Ounces conversions.
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Formula
oz = gr × 0.00228571428571
gr = oz ÷ 0.00228571428571
Conversion table
| 1 gr | 0.002286 oz |
| 5 gr | 0.011429 oz |
| 10 gr | 0.022857 oz |
| 20 gr | 0.045714 oz |
| 50 gr | 0.114286 oz |
| 100 gr | 0.228571 oz |
| 500 gr | 1.142857 oz |
| 1000 gr | 2.285714 oz |
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Frequently asked questions
What is the source unit in this conversion?
The source unit is the grain (gr). A grain is exactly 64.79891 milligrams.
What is the destination unit in this conversion?
The destination unit is the ounce (oz). An avoirdupois ounce is 1/16 pound.
How do I convert grains to ounces?
Multiply the number of grains by 0.00228571428571 to get the equivalent value in ounces. For example, 5 gr × 0.00228571428571 = 0.011429 oz.
Is the grain to ounce conversion exact?
Yes. This converter uses a fixed factor of 0.00228571428571, so results are precise and consistent every time you use it.
Where is this conversion commonly used?
It's used in everyday measurement, shipping and logistics, scientific and industrial work, and any context where you need to switch between grain and ounce values.
Can I convert ounces back to grains?
Yes. Multiply the ounces value by 437.5, or divide it by 0.00228571428571, to convert back to grains.
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About this conversion
This page converts grains (gr) into ounces (oz) using the Universal Converter's mass conversion engine.
Grain-to-Ounce conversions are useful for everyday calculations, scientific work, shipping, and any task that mixes different weight or mass units.
The formula is oz = gr × 0.00228571428571, based on the standard definitions of grain and ounce.
Because the conversion factor is fixed, results stay consistent and repeatable no matter how many times you calculate them.
Grain: A grain is exactly 64.79891 milligrams. Ounce: An avoirdupois ounce is 1/16 pound.