Definition of Diamond Carat
Carat refers to the weight of a diamond, not its size. It is a unique measurement of weight specifically used for measuring diamonds and gemstones.
Conversion Ratio:
1 Carat = 0.2 Grams
Smaller diamonds can look similar in size but weigh differently depending on their cut and proportions.
Total Carat Weight
When a piece of jewellery contains more than one gemstone, Total Carat Weight represents the combined weight of all gemstones in that specific piece of jewellery.
For example, the total carat weight quoted for a pair of diamond earrings would include the diamonds used in both earrings.
How Carat Weight of a Diamond Affects Price
Carat weight significantly influences a diamond’s value. Larger diamonds are rarer in nature and therefore more valuable.
The price increments for diamonds are exponential, not linear.
For instance, a 1.00 carat diamond will cost more than two 0.50 carat diamonds of the same quality.
Diamond Carat Size Chart (Round Brilliant Cut)
| Carat Weight | Approx. Diameter (mm) | Visual Impression |
| 0.25 ct | ~4.1 mm | Petite, delicate sparkle |
| 0.30 ct | ~4.3 mm | Subtle yet noticeable |
| 0.5 ct | ~5.0 mm | Classic choice, elegant |
| 0.75 ct | ~5.8 mm | Balanced size & value |
| 1.00 ct | ~6.4–6.5 mm | Timeless & desirable |
| 1.50 ct | ~7.4 mm | Bold and impressive |
| 2.00 ct | ~8.1 mm | Striking, luxury feel |
| 3.00 ct | ~9.3 mm | Rare, statement-making |
Tips for Picking the Best Carat Weight When Buying a Diamond
Ultimately, the “best” carat weight depends on individual preferences, budget and the size of an individual's fingers (a diamond can appear larger or smaller depending on hand size).
If a particular design or carat weight is too far out of your price range, be sure to explore our lab grown diamonds. They offer the same sparkle and brilliance at a more accessible price.
Still unsure which carat suits you best? Visit a Love & Co. boutique to try different sizes on your finger and discover the perfect diamond ring that feels just right for you.