1 Ounce = 141.747616 Carats
1 Troy Ounce = 155.517384 Carats
Ounce is an imperial and US Customary mass unit. Troy ounce is used for the measurement of precious metals, gold, silver etc. The abbreviation is "oz".
Carat is a unit of mass and used to describe the weight of diamonds, gemstones, pearls. 1 grams equals to 5 carats and 1 ounce is 141.747616 carats. It is abbreviated as "ct".