How to convert carats to micrograms
To convert a measurement in carats to micrograms, multiply the value by 200,000. The conversion factor comes from the relationship between both units and the kilogram.
For example, to convert 5 ct to micrograms: 5 × 200,000 = 1,000,000 µg.
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.
What is a microgram?
A microgram is a metric unit of mass equal to one millionth of a gram (0.000001 g) or one billionth of a kilogram. The microgram (sometimes abbreviated 'mcg' in medicine to avoid confusion with 'mg') became important with the discovery of vitamins and hormones that are active in tiny quantities. The prefix 'micro' comes from the Greek for 'small'.
Common uses of micrograms include: Vitamin and trace-mineral dosages (e.g. vitamin D, B12); Hormone and potent drug amounts; Environmental contaminant concentrations; Analytical chemistry and toxicology.
Carats to micrograms worked examples
Here are some common values converted:
1 ct = 200,000 µg 5 ct = 1,000,000 µg 10 ct = 2,000,000 µg 50 ct = 10,000,000 µg 100 ct = 20,000,000 µg
Frequently asked questions
How many micrograms are in one carat?
One carat (ct) equals 200,000 micrograms (µg). Multiply any value in carats by 200,000 to convert to micrograms.
How do I convert carats to micrograms?
Multiply the value in carats by 200,000. For example, 5 ct × 200,000 = 1,000,000 µg.
How do I convert micrograms to carats?
Multiply the value in micrograms by 0.000005, or divide by 200,000. Use the swap button on the converter above to reverse the direction.
Is the carat to microgram 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 carats to micrograms?
The formula is: µg = ct × 200,000. This comes from the definition of both units relative to the kilogram.