Trillion-cut Diamond Size Chart
Carat to mm size chart for trillion-cut Diamond, from 0.25ct to 40ct. The chart is interactive, meaning you can click on any stone to view it directly in the size simulator.
Gem sizes are shown in actual, real-world size, provided your device screen size is in diagonal. If this is not correct, change it here:
Gem sizes are shown in actual, real-world size, provided your device screen size is in diagonal. If this is not correct, change it here:
Actual size is set for screen
Gemstone:
Shape:
Diamond Size Chart (Trillion Cut)
0.25ct
4.87×4.87 mm
4.87×4.87 mm
0.5ct
6.14×6.14 mm
6.14×6.14 mm
0.75ct
7.03×7.03 mm
7.03×7.03 mm
1ct
7.74×7.74 mm
7.74×7.74 mm
1.25ct
8.33×8.33 mm
8.33×8.33 mm
1.5ct
8.86×8.86 mm
8.86×8.86 mm
1.75ct
9.32×9.32 mm
9.32×9.32 mm
2ct
9.75×9.75 mm
9.75×9.75 mm
2.5ct
10.5×10.5 mm
10.5×10.5 mm
3ct
11.16×11.16 mm
11.16×11.16 mm
3.5ct
11.75×11.75 mm
11.75×11.75 mm
4ct
12.28×12.28 mm
12.28×12.28 mm
4.5ct
12.77×12.77 mm
12.77×12.77 mm
5ct
13.23×13.23 mm
13.23×13.23 mm
5.5ct
13.66×13.66 mm
13.66×13.66 mm
6ct
14.06×14.06 mm
14.06×14.06 mm
6.5ct
14.44×14.44 mm
14.44×14.44 mm
7ct
14.8×14.8 mm
14.8×14.8 mm
7.5ct
15.14×15.14 mm
15.14×15.14 mm
8ct
15.47×15.47 mm
15.47×15.47 mm
8.5ct
15.79×15.79 mm
15.79×15.79 mm
9ct
16.09×16.09 mm
16.09×16.09 mm
9.5ct
16.38×16.38 mm
16.38×16.38 mm
10ct
16.67×16.67 mm
16.67×16.67 mm
11ct
17.2×17.2 mm
17.2×17.2 mm
12ct
17.71×17.71 mm
17.71×17.71 mm
13ct
18.19×18.19 mm
18.19×18.19 mm
14ct
18.64×18.64 mm
18.64×18.64 mm
15ct
19.08×19.08 mm
19.08×19.08 mm
16ct
19.49×19.49 mm
19.49×19.49 mm
17ct
19.89×19.89 mm
19.89×19.89 mm
18ct
20.27×20.27 mm
20.27×20.27 mm
19ct
20.64×20.64 mm
20.64×20.64 mm
20ct
21×21 mm
21×21 mm
22ct
21.68×21.68 mm
21.68×21.68 mm
24ct
22.31×22.31 mm
22.31×22.31 mm
26ct
22.92×22.92 mm
22.92×22.92 mm
28ct
23.49×23.49 mm
23.49×23.49 mm
30ct
24.04×24.04 mm
24.04×24.04 mm
33ct
24.81×24.81 mm
24.81×24.81 mm
36ct
25.54×25.54 mm
25.54×25.54 mm
40ct
26.46×26.46 mm
26.46×26.46 mm
Length-to-width ratio: 1, Color:
Download Chart
Note: If you want to cut out the shapes and try them on your finger, print out the PDF chart. The image (png) chart will not print at actual size.
Carat-to-MM Conversion Table
Use this conversion table to quickly convert trillion-cut Diamond carat weights to their approximate millimeter (mm) sizes:
| Carat Weight | MM Size |
|---|---|
| 0.25 ct | 4.87×4.87 mm |
| 0.5 ct | 6.14×6.14 mm |
| 0.75 ct | 7.03×7.03 mm |
| 1 ct | 7.74×7.74 mm |
| 1.25 ct | 8.33×8.33 mm |
| 1.5 ct | 8.86×8.86 mm |
| 1.75 ct | 9.32×9.32 mm |
| 2 ct | 9.75×9.75 mm |
| 2.5 ct | 10.5×10.5 mm |
| 3 ct | 11.16×11.16 mm |
| 3.5 ct | 11.75×11.75 mm |
| 4 ct | 12.28×12.28 mm |
| 4.5 ct | 12.77×12.77 mm |
| 5 ct | 13.23×13.23 mm |
| 5.5 ct | 13.66×13.66 mm |
| 6 ct | 14.06×14.06 mm |
| 6.5 ct | 14.44×14.44 mm |
| 7 ct | 14.8×14.8 mm |
| 7.5 ct | 15.14×15.14 mm |
| 8 ct | 15.47×15.47 mm |
| 8.5 ct | 15.79×15.79 mm |
| Carat Weight | MM Size |
|---|---|
| 9 ct | 16.09×16.09 mm |
| 9.5 ct | 16.38×16.38 mm |
| 10 ct | 16.67×16.67 mm |
| 11 ct | 17.2×17.2 mm |
| 12 ct | 17.71×17.71 mm |
| 13 ct | 18.19×18.19 mm |
| 14 ct | 18.64×18.64 mm |
| 15 ct | 19.08×19.08 mm |
| 16 ct | 19.49×19.49 mm |
| 17 ct | 19.89×19.89 mm |
| 18 ct | 20.27×20.27 mm |
| 19 ct | 20.64×20.64 mm |
| 20 ct | 21×21 mm |
| 22 ct | 21.68×21.68 mm |
| 24 ct | 22.31×22.31 mm |
| 26 ct | 22.92×22.92 mm |
| 28 ct | 23.49×23.49 mm |
| 30 ct | 24.04×24.04 mm |
| 33 ct | 24.81×24.81 mm |
| 36 ct | 25.54×25.54 mm |
| 40 ct | 26.46×26.46 mm |