Understanding Diamond Carat Size and Weight
Carat
Carat denotes the weight of a diamond, not the size. Two diamonds that have the same carat weight may actually have very different sizes in millimeters.
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Carat denotes the weight of a diamond, not the size. Two diamonds that have the same carat weight may actually have very different sizes in millimeters.
Typical range for Carat is between 1.0 and 2.0 carat.
A Diamond’s Weight is measured in Carats. One carat is equal to 200 milligrams, or 0.2 grams. The weight of smaller diamonds is often expressed as points instead of carats -- there are 100 points in a Carat. Another way to look at it is to say that each point equals 0.01, or One-Hundred, of a Carat. For example, 0.08 means eight One-Hundred, so a 0.08 Carat Diamond equals eight points.
NOTE: DON'T CONFUSE "CARAT WEIGHT" WITH "KARAT," WHICH IS THE METHOD OF DETERMINING THE PURITY OF GOLD.
Can two diamonds with the same carat look different in size?
Yes, cut quality and shape affect visual size. For example, an oval diamond may look larger than a round one of the same weight.
How does diamond carat affect price per carat?
Larger carat diamonds have a higher price per carat due to rarity and demand, creating a non-linear price increase.
Is diamond size the same as diamond carat?
No, carat measures weight, not physical size. A diamond’s shape and cut quality also affect how large it appears.
What is the definition of a carat in diamond measurement
One carat equals 200 milligrams (0.2 grams). It measures the diamond’s weight, not its size.
How can I visually compare different carat sizes?
Use our Ct Size Comparison tool to see how diamonds of different carat weights appear across shapes like round, princess, and oval.
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