The ounce is a small mass unit used in imperial and United States customary systems. One avoirdupois ounce equals 28.349523125 grams.
Different ounce definitions existed historically, but the modern avoirdupois ounce is standardized through its 1/16 relationship with the pound.
Measurement system: Imperial and US customary systems. SI equivalent: 1 oz = 28.349523125 g.
Ounce facts
- Unit name
- Ounce
- Symbol
- oz
- Category
- Mass
- Measurement system
- Imperial and US customary systems
- SI equivalent
- 1 oz = 28.349523125 g
- Common uses
- Packaging, food products and lightweight trade quantities
Definition of the ounce
The ounce is a small mass unit used in imperial and United States customary systems. One avoirdupois ounce equals 28.349523125 grams.
Measurement system and SI relationship
Imperial and US customary systems
SI equivalent: 1 oz = 28.349523125 g
History of the ounce
Different ounce definitions existed historically, but the modern avoirdupois ounce is standardized through its 1/16 relationship with the pound.
Where is the ounce used?
Packaging, food products and lightweight trade quantities