Ounce (oz)
Definition: The ounce (oz) is a unit of weight in the avoirdupois system, where one ounce is defined as 1/16th of a pound, or approximately 28.3495 grams. It is used for measuring small weights, particularly in food, jewelry, and postal services.
History: The ounce originates from the Roman uncia, which was 1/12 of a libra (pound). The system evolved in medieval England, leading to the modern avoirdupois system in 16th-century Britain, where 16 ounces make up one pound. Despite metrication, the ounce remains in widespread use in some countries.
Current Use: Ounces are commonly used for food packaging, precious metals (like gold and silver in troy ounces), and postal weights. They also appear in personal weight measurement and recipes, especially in countries that use the imperial system.
Stone (st)
Definition: The stone (st) is a British unit of mass equivalent to 14 pounds, or approximately 6.35 kilograms. It is mainly used in the UK and Ireland for measuring body weight and, historically, agricultural produce and trade goods.
History: The stone has been used in Europe for centuries, with varying values depending on the region and commodity measured. The British stone was standardized at 14 pounds in 1835 under the Weights and Measures Act, primarily for weighing people and livestock. While largely replaced by metric units, it remains popular in sports and healthcare.
Current Use: The stone is still used in the UK and Ireland to express body weight, especially in medical and fitness contexts. It is less common in trade but occasionally used for measuring wool and agricultural products.
Quick Conversion Table Ounce (oz) to Stone (st)
1 Ounce (oz) equal to 0.004464285 Stone (st)
5 Ounce (oz) equal to 0.022321426 Stone (st)
10 Ounce (oz) equal to 0.044642852 Stone (st)
20 Ounce (oz) equal to 0.089285704 Stone (st)
30 Ounce (oz) equal to 0.133928557 Stone (st)
50 Ounce (oz) equal to 0.223214261 Stone (st)
75 Ounce (oz) equal to 0.334821392 Stone (st)
100 Ounce (oz) equal to 0.446428522 Stone (st)