Ounce US Converter

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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.

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.