Convert ounces (oz) to grams, pounds, kilograms, and other mass units.
Calculator
The ounce (oz) is a unit of mass in the British Imperial system. The avoirdupois ounce is 1/16 of a pound, or exactly 28.3495 g, used in the US and the UK for weighing food, beverages, and mail.
Common Ounce Conversions
- 1 oz = 28.3495 g — exact value by definition.
- 1 oz ≈ 0.02835 kg — divide by 35.274 to convert to kilograms.
- 1 oz = 1/16 lb ≈ 0.0625 lb — sixteen ounces equal one pound.
- 1 oz ≈ 0.00284 st — multiply by 0.00284 to convert to stones.
- 16 oz = 1 lb = 453.6 g — for easy comparison.
Note the difference between the avoirdupois ounce (oz) and the troy ounce (troy oz) — the latter equals 31.1035 g and is used for weighing precious metals such as gold and silver.