June 21st 2022
Diamond Size Chart
By Devin Jones
How big is a 1 carat diamond in millimeters? How many carats is a 5 millimeter diamond? The below diamond size charts will help you convert carat weight to millimeters and vice versa.
Round
Cushion
Emerald
Oval
Princess
Pear
Radiant
Asscher
Heart
MarquiseDiamond Carat Size Chart
The below diamond carat size chart is for round cut diamonds.
| Diamond Carat Weight | Diamond MM Size | Surface Area (sq. mm) |
|---|---|---|
| 0.3 ct. | 4.30 | 14.52 |
| 0.4 ct. | 4.73 | 17.59 |
| 0.5 ct. | 5.10 | 20.41 |
| 0.6 ct. | 5.42 | 23.04 |
| 0.7 ct. | 5.70 | 25.53 |
| 0.8 ct. | 5.96 | 27.90 |
| 0.9 ct. | 6.20 | 30.17 |
| 1 ct. | 6.42 | 32.37 |
| 1.1 ct. | 6.63 | 34.49 |
| 1.2 ct. | 6.82 | 36.54 |
| 1.3 ct. | 7.01 | 38.54 |
| 1.4 ct. | 7.18 | 40.49 |
| 1.5 ct. | 7.35 | 42.39 |
| 1.6 ct. | 7.51 | 44.25 |
| 1.7 ct. | 7.66 | 46.07 |
| 1.8 ct. | 7.81 | 47.86 |
| 1.9 ct. | 7.95 | 49.61 |
| 2 ct. | 8.08 | 51.34 |
| 2.1 ct. | 8.22 | 53.03 |
| 2.2 ct. | 8.35 | 54.70 |
| 2.3 ct. | 8.47 | 56.34 |
| 2.4 ct. | 8.59 | 57.96 |
| 2.5 ct. | 8.71 | 59.55 |
| 2.6 ct. | 8.82 | 61.13 |
| 2.7 ct. | 8.93 | 62.68 |
| 2.8 ct. | 9.04 | 64.22 |
| 2.9 ct. | 9.15 | 65.74 |
| 3 ct. | 9.25 | 67.24 |
| 3.1 ct. | 9.35 | 68.72 |
| 3.2 ct. | 9.45 | 70.19 |
| 3.3 ct. | 9.55 | 71.64 |
| 3.4 ct. | 9.65 | 73.08 |
| 3.5 ct. | 9.74 | 74.50 |
| 3.6 ct. | 9.83 | 75.91 |
| 3.7 ct. | 9.92 | 77.31 |
| 3.8 ct. | 10.01 | 78.69 |
| 3.9 ct. | 10.10 | 80.06 |
| 4 ct. | 10.18 | 81.43 |
| 4.1 ct. | 10.27 | 82.77 |
| 4.2 ct. | 10.35 | 84.11 |
| 4.3 ct. | 10.43 | 85.44 |
| 4.4 ct. | 10.51 | 86.76 |
| 4.5 ct. | 10.59 | 88.06 |
| 4.6 ct. | 10.67 | 89.36 |
| 4.7 ct. | 10.74 | 90.65 |
| 4.8 ct. | 10.82 | 91.93 |
| 4.9 ct. | 10.89 | 93.20 |
| 5 ct. | 10.97 | 94.46 |
