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Density and Mass

grtooz

Convert grains (gr) to ounces (avoirdupois) (oz).

Factor1 gr = 0.002285714 oz

Converter

gr

Accepts numbers or expressions, e.g. 150 + 14.7

Result
1oz

Rendered to 6 significant figures.

Formula

Formula
oz = gr × 0.002285714

Multiply any value in grains by 0.002285714 to obtain the value in ounces (avoirdupois).

Worked example

Convert 437.5 gr to oz.

  1. 01Start with 437.5 gr.
  2. 02Multiply by the conversion factor: 437.5 × 0.002285714 = 1 oz.
Result437.5 gr = 1 oz

Conversion table

groz
10.0022857
20.0045714
50.011429
100.022857
200.045714
500.11429
1000.22857
2000.45714
5001.1429
10002.2857

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from gr to oz?
1 gr equals 0.002285714 oz. To convert, multiply the value in grains by 0.002285714.
How do I convert 1 gr to oz?
1 gr = 0.00228571 oz. For any value, multiply by 0.002285714.
How do I convert oz back to gr?
Divide by the same factor — or equivalently, multiply by 437.5. So 1 oz = 437.5 gr.
When would I need to convert grain (troy/apothecary) to ounce (avoirdupois)?
Mass conversions appear in material balances, reagent dosing, and reconciling vendor specifications across imperial/metric systems.
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).

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