Ounce (oz)
Exactly 1/16 of an avoirdupois pound.
What is an ounce?
- Symbol
- oz
- Quantity
- Weight & Mass
- Unit system
- US customary
- Definition
- Exactly 1/16 of an avoirdupois pound.
- Exact
- Yes, the value is exact by definition
- Source
- International yard and pound agreement (1959)
Common applications
Used in the United States for food portions, packaged goods and postage. This is the avoirdupois ounce, not the troy ounce used for precious metals.
Ounce in other weight & mass units
- 1 oz = 28349523.125 µgMicrogram
- 1 oz = 28349.523125 mgMilligram
- 1 oz = 28.349523125 gOunce to Gram converter
- 1 oz = 0.028349523125 kgOunce to Kilogram converter
- 1 oz = 0.000028349523125 tTonne (metric ton)
- 1 oz = 141.747615625 ctCarat (metric)
- 1 oz = 437.5 grGrain
- 1 oz = 0.0625 lbOunce to Pound converter
- 1 oz = 0.00003125 short tnShort ton (US ton)
- 1 oz ≈ 0.00002790178571 long tnLong ton (UK ton)
Ounce quick reference
| Ounce | Gram | Kilogram | Pound |
|---|---|---|---|
| 1 oz | = 28.349523125 g | = 0.028349523125 kg | = 0.0625 lb |
| 10 oz | = 283.49523125 g | = 0.28349523125 kg | = 0.625 lb |
| 100 oz | = 2834.9523125 g | = 2.8349523125 kg | = 6.25 lb |
| 1000 oz | = 28349.523125 g | = 28.349523125 kg | = 62.5 lb |
Where the ounce fits
The next smaller weight & mass unit is the gram (g). 1 oz = 28.349523125 g, and 1 g ≈ 0.03527396195 oz.
The next larger weight & mass unit is the pound (lb). 1 oz = 0.0625 lb, and 1 lb = 16 oz.
Frequently asked questions
- How many grams are in one ounce?
- One ounce = 28.349523125 g (grams).
- How many kilograms are in one ounce?
- One ounce = 0.028349523125 kg (kilograms).
- How many pounds are in one ounce?
- One ounce = 0.0625 lb (pounds).