Convert Grams to Carats
Convert Grams to Carats instantly. 1 Gram (g) equals 5 Carats (ct).
Grams to Carats conversion table
| Grams (g) | Carats (ct) |
|---|---|
| 1 g | 5 ct |
| 2 g | 10 ct |
| 3 g | 15 ct |
| 5 g | 25 ct |
| 10 g | 50 ct |
| 20 g | 100 ct |
| 50 g | 250 ct |
| 100 g | 500 ct |
| 500 g | 2,500 ct |
| 1,000 g | 5,000 ct |
1 Gram = 5 Carats · multiply Grams by 5
About converting Grams to Carats
Grams (g) and Carats (ct) are both units of weight & mass, so converting between them is a single multiplication: multiply your Grams figure by 5. Ten Grams comes to 50 Carats, and a hundred works out at 500 Carats.
Rule of thumb: going from Grams to Carats multiplies, so the figure always grows — one Gram is already 5 Carats. If your answer came out smaller, you have the conversion the wrong way round.
What is a Gram?
The gram sits oddly in SI: the kilogram, not the gram, is the official base unit of mass, which makes mass the only quantity whose base unit carries a prefix built into its name. The gram was defined in 1795 as the mass of a cubic centimetre of water at the melting point of ice — a definition that tied mass neatly to length and made the young metric system self-consistent. It survives as the working unit of nutrition labels, recipes, postage and laboratory work: anything small enough that kilograms would force you into decimals.
What is a Carat?
The metric carat is 0.2 grams exactly, standardised early in the twentieth century to replace a tangle of local carats that differed from one gem market to the next. Its name is traditionally traced to the carob seed, once used as a counterweight for small valuables. The trap is the near-identical karat, which is not a mass at all — it measures gold purity in twenty-fourths, so 18-karat gold is eighteen parts gold to six of other metal. Jewellers also split the carat into 100 points, which is why a "fifty-point" diamond is simply half a carat.
To put both in perspective: a paperclip weighs about a gram, while a typical engagement-ring diamond weighs about one carat.
The converter above updates as you type, and the table lists common values for quick reference. Need the opposite direction? Use the Carats to Grams converter, or browse all Weight & Mass converters.
Frequently asked questions
How many Carats are in one Gram?
There are 5 Carats in one Gram.
How do I convert Grams to Carats?
Multiply the number of Grams by 5. For example, 10 Grams = 50 Carats.
What is 100 Grams in Carats?
100 Grams is equal to 500 Carats.
How do I convert Carats to Grams?
Multiply the Carats value by 0.2 (or divide by 5).
Is this Grams to Carats conversion exact?
Yes, exactly. Both units are fixed against the same base by definition, and 1 Gram = 5 Carats is the complete value — nothing is rounded away.
What is a Gram?
The gram sits oddly in SI: the kilogram, not the gram, is the official base unit of mass, which makes mass the only quantity whose base unit carries a prefix built into its name. The gram was defined in 1795 as the mass of a cubic centimetre of water at the melting point of ice — a definition that tied mass neatly to length and made the young metric system self-consistent. It survives as the working unit of nutrition labels, recipes, postage and laboratory work: anything small enough that kilograms would force you into decimals.
What is a Carat?
The metric carat is 0.2 grams exactly, standardised early in the twentieth century to replace a tangle of local carats that differed from one gem market to the next. Its name is traditionally traced to the carob seed, once used as a counterweight for small valuables. The trap is the near-identical karat, which is not a mass at all — it measures gold purity in twenty-fourths, so 18-karat gold is eighteen parts gold to six of other metal. Jewellers also split the carat into 100 points, which is why a "fifty-point" diamond is simply half a carat.