How to convert ounces to carats
To convert a measurement in ounces to carats, multiply the value by 141.747616. The conversion factor comes from the relationship between both units and the kilogram.
For example, to convert 5 oz to carats: 5 × 141.747616 = 708.738078 ct.
What is a ounce?
An ounce is an imperial and US customary unit of mass equal to 1/16 of a pound or exactly 28.349523125 grams. The avoirdupois ounce descends from the Roman 'uncia' (one twelfth). It is distinct from the troy ounce used for precious metals, which is heavier at about 31.1 grams.
Common uses of ounces include: Food portions and recipe ingredients in the US; Postal and letter weights; Packaged goods net weight (cereal, snacks); Baby birth weights in the US.
What is a carat?
A carat is a unit of mass for gemstones equal to exactly 200 milligrams (0.2 grams). The carat takes its name from the carob seed, once used as a counterweight for weighing gems. The metric carat of exactly 200 mg was adopted internationally in the early 20th century to standardize the gem trade.
Common uses of carats include: Diamond and gemstone weight; Jewelry pricing and grading; Pearl and precious stone trading; Gemological certification.
Ounces to carats worked examples
Here are some common values converted:
1 oz = 141.747616 ct 5 oz = 708.738078 ct 10 oz = 1,417.4762 ct 50 oz = 7,087.3808 ct 100 oz = 14,174.7616 ct
Frequently asked questions
How many carats are in one ounce?
One ounce (oz) equals 141.747616 carats (ct). Multiply any value in ounces by 141.747616 to convert to carats.
How do I convert ounces to carats?
Multiply the value in ounces by 141.747616. For example, 5 oz × 141.747616 = 708.738078 ct.
How do I convert carats to ounces?
Multiply the value in carats by 0.00705479239, or divide by 141.747616. Use the swap button on the converter above to reverse the direction.
Is the ounce to carat conversion exact?
Yes. Since 1959 the international pound is defined as exactly 0.45359237 kg, so all weight conversions between metric and avoirdupois units use exact factors.
What is the formula for ounces to carats?
The formula is: ct = oz × 141.747616. This comes from the definition of both units relative to the kilogram.