Ounce US to Grain Converter

1 Ounce US = 437.5 Grain
Ounce US (oz) ➜ Grain (gr)
 
oz

Ounce US vs Grain Comparison Chart

Source - Ounce USTarget - Grain

Ounce US (oz) - Definition and Overview

What is Ounce US?

The international avoirdupois ounce(oz) is exactly 28.349523125 gram. This is the United States customary and British imperial ounce. It is primarily used in the United States to measure packaged foods and food portions, postal items ect.

Summary

  • The international avoirdupois ounce (oz) is a unit of mass equal to exactly 28.349523125 grams
  • It is used in the United States customary and British imperial systems
  • The ounce is primarily used in the United States to measure packaged foods, food portions, postal items, and more.

Grain (gr) - Definition and Overview

What is Grain?

A grain is a unit of mass that is part of the avoirdupois, apothecaries, and troy weight systems. 1 grain is equal to 0.06479891 grams. It is historically based on the weight of a single grain of cereal, such as wheat or barley.

Summary

  • A grain is a traditional unit of mass that is based on the weight of a single grain of cereal, such as wheat or barley
  • It is used in the avoirdupois, apothecaries, and troy weight systems
  • One grain is equal to approximately 0.06479891 grams.

How to Convert Ounce US to Grain?

1 Ounce US is equal to 437.5 Grain. To convert Ounce US to Grain, use this simple formula:

Grain = Ounce US x 437.5

So, just multiply the number of Ounce US by 437.5 to get equivalent value in Grain.

Example 1:

Convert 5 Ounce US to Grain
5 x 437.5 = 2187.5 Grain

Example 2:

Convert 7.5 Ounce US to Grain
7.5 x 437.5 = 3281.25 Grain

Complete List of Ounce US Converters

  1. Ounce US to Aana
  2. Ounce US to Bhori
  3. Ounce US to Baht
  4. Ounce US to Carat
  5. Ounce US to Don
  6. Ounce US to Grain
  7. Ounce US to Gram
  8. Ounce US to Hong Kong Tael
  9. Ounce US to Kilogram
  10. Ounce US to Microgram
  11. Ounce US to Milligram
  12. Ounce US to Masha
  13. Ounce US to Mesghal
  14. Ounce US to Ounce US
  15. Ounce US to Pavan
  16. Ounce US to Pound
  17. Ounce US to Ratti
  18. Ounce US to Stone US
  19. Ounce US to Stone UK
  20. Ounce US to Tola
  21. Ounce US to Troy Ounce
  22. Ounce US to Tonne Metric
  23. Ounce US to Tonne US
  24. Ounce US to Tonne UK

Complete List of Grain Converters

  1. Grain to Aana
  2. Grain to Bhori
  3. Grain to Baht
  4. Grain to Carat
  5. Grain to Don
  6. Grain to Grain
  7. Grain to Gram
  8. Grain to Hong Kong Tael
  9. Grain to Kilogram
  10. Grain to Microgram
  11. Grain to Milligram
  12. Grain to Masha
  13. Grain to Mesghal
  14. Grain to Ounce US
  15. Grain to Pavan
  16. Grain to Pound
  17. Grain to Ratti
  18. Grain to Stone US
  19. Grain to Stone UK
  20. Grain to Tola
  21. Grain to Troy Ounce
  22. Grain to Tonne Metric
  23. Grain to Tonne US
  24. Grain to Tonne UK

Author Information

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Rajesh V U

Full-Stack Developer & Storage Technologist | Creator of UnitSmash.com
Last updated: June 1, 2026

I am a Storage Technologist with strong experience in enterprise storage systems, Angular development, and web-based tools. I enjoy building practical calculators, converters, and utilities, and I also create original cartoons. I share my tools, articles, and creative work on my personal website, rajeshvu.com.