oz

What is a Ounce?

Weight Unit

Definition

An ounce is a unit of mass equal to 1/16 of a pound or approximately 28.35 grams. There are two types: avoirdupois ounce (common) and troy ounce (precious metals).

Popular Ounce Conversions

Most common conversions from Ounces

1 oz = 0.02835 kg Ounce to Kilograms 1 oz = 28.3495 g Ounce to Grams 1 oz = 28,349.52 mg Ounce to Milligrams 1 oz = 0.0000283495 t Ounce to Metric Tons 1 oz = 0.0625 lb Ounce to Pounds 1 oz = 0.0044642857 st Ounce to Stones

History

The ounce comes from the Latin 'uncia', meaning one-twelfth. The avoirdupois ounce became standard for commerce, while the troy ounce remained for precious metals.

Common Uses

  • Food portions and recipes in the US
  • Precious metals (gold, silver) pricing
  • Postal weights
  • Beverage serving sizes

Fun Facts

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A troy ounce (31.1g) is heavier than an avoirdupois ounce (28.35g)

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Gold prices are quoted in troy ounces

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There are 8 fluid ounces in a cup

All Ounce Conversions

Ounces to Kilograms oz → kg Ounces to Grams oz → g Ounces to Milligrams oz → mg Ounces to Metric Tons oz → t Ounces to Pounds oz → lb Ounces to Stones oz → st Ounces to US Tons oz → ton Ounces to Imperial Tons oz → long ton Ounces to Micrograms oz → μg

Related Units

lb Pound g Gram kg Kilogram st Stone