How to convert grams to carats
To convert a measurement in grams to carats, multiply the value by 5. The conversion factor comes from the relationship between both units and the kilogram.
For example, to convert 5 g to carats: 5 × 5 = 25 ct.
What is a gram?
A gram is a metric unit of mass equal to one thousandth of a kilogram (0.001 kg) or about 0.035 ounces. Defined in 1795 as the mass of one cubic centimeter of water at the temperature of melting ice. The gram is the base for many everyday metric masses and the reference point for nutritional labeling worldwide.
Common uses of grams include: Cooking and recipe ingredient quantities; Nutrition labels and food portions; Postage and small parcel weight; Jewelry and precious metal weighing.
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.
Grams to carats worked examples
Here are some common values converted:
1 g = 5 ct 5 g = 25 ct 10 g = 50 ct 50 g = 250 ct 100 g = 500 ct
Frequently asked questions
How many carats are in one gram?
One gram (g) equals 5 carats (ct). Multiply any value in grams by 5 to convert to carats.
How do I convert grams to carats?
Multiply the value in grams by 5. For example, 5 g × 5 = 25 ct.
How do I convert carats to grams?
Multiply the value in carats by 0.2, or divide by 5. Use the swap button on the converter above to reverse the direction.
Is the gram 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 grams to carats?
The formula is: ct = g × 5. This comes from the definition of both units relative to the kilogram.