CT Conversion Chart

Click on the the cut to view its millimeter to carat conversion chart
    • Round
    • Princess
    • Asscher
    • Marquise
    • Radiant
    • Cushion
    • Pear
    • Oval
    • Heart
    • Trillion
    • Emerald
    • Triangle
    • Baguette Tapered
    • Baguette Straight

Round Cut

MM SizeCarat Weight
0.80.0025
10.005
1.120.0075
1.150.0067
1.250.01
1.30.01
1.50.015
1.750.02
1.80.025
20.03
2.250.04
2.50.06
2.750.08
30.11
3.250.14
3.50.17
3.750.21
40.25
4.250.28
4.50.36
4.750.44
50.46
5.250.56
5.50.66
5.750.76
60.84
6.250.93
6.51.03
6.751.24
MM SizeCarat Weight
71.28
7.251.49
7.51.67
7.751.75
82.04
8.252.11
8.52.43
8.752.55
92.75
9.253.05
9.53.35
9.753.61
103.87
10.254.16
10.54.41
10.754.57
114.91
11.255.49
11.55.85
126.84
12.257.26
12.57.36
12.757.52
138.51
13.59.53
1410.49
1512.89
1616.06

Princess / Square Cut

MM SizeCarat Weight
1.50.015
1.750.03
20.06
2.250.08
2.50.1
2.750.13
30.18
3.250.26
3.50.29
3.750.31
40.39
4.250.44
4.50.56
4.750.64
50.71
5.250.75
5.50.99
5.751.11
61.24
6.251.39
MM SizeCarat Weight
6.51.59
6.751.75
71.96
7.252.01
7.52.4
7.752.74
83.01
8.253.24
8.53.67
8.754.1
94.12
9.55.09
9.755.36
105.62
10.255.76
10.55.99
117.44
11.59.44
129.52

Asscher Cut

MM SizeCarat Weight
40.39
4.50.56
50.71
5.50.99
61.24
6.51.59
71.96
7.52.4
MM SizeCarat Weight
83.01
8.53.67
94.12
9.55.09
105.62
117.44
129.52
1312.66

Marquise Cut

MM SizeCarat Weight
3 x 1.50.025
3.5 x 1.750.065
3.5 x 20.07
3.75 x 1.750.11
4 x 20.1
4.25 x 2.250.12
5 x 2.50.14
5 x 30.2
5.5 x 2.750.16
5.5 x 30.18
6 x 30.25
6.5 x 30.23
7 x 30.3
7 x 3.5.35
7 x 43.4
7.5 x 3.50.33
8 x 40.47
9 x 4.50.71
MM SizeCarat Weight
9 x 50.76
9.5 x 20.85
10 x 50.95
11 x 5.51.25
11.5 x 61.33
12 x 61.62
12 x 6.51.71
13 x 6.52.11
14 x 72.48
15 x 7.53.09
14 x 83
15 x 73.12
15 x 83.44
16 x 83.86
17 x 8.54.88
17.5 x 105.5
20 x 87.08
20 x 107.94
20 x 119.5

Radiant Cut

MM SizeCarat Weight
4.5 x 3.50.34
5 x 30.31
6 x 30.41
6 x 4.60
6.5 x 4.50.83
7 x 51.14
7.25 x 5.251.24
7.5 x 5.51.47
8 x 61.74
8.5 x 6.52.25
9 x 72.62
9.5 x 7.53.18
10 x 73.31
MM SizeCarat Weight
10 x 83.49
11 x 95.05
11.5 x 106.45
12 x 96.06
12 x 106.79
13 x 96.54
13 x 119.33
13.5 x 11.510.19
14 x 108.47
14 x 1212.14
15 x 1111.48
16 x 1214.22

Cushion Cut

MM SizeCarat Weight
40.25
4.50.36
50.46
5.250.56
5.50.66
5.750.76
60.84
6.250.93
6.51.03
6.751.24
71.28
7.51.67
MM SizeCarat Weight
82.04
8.52.43
92.75
9.53.35
103.87
10.54.41
114.91
11.55.85
126.84
138.51
1410.49
1512.89

Pear Cut

MM SizeCarat Weight
3 x 20.13
4 x 2.50.18
4 x 30.21
5 x 30.25
5 x 40.35
6 x 40.39
6.5 x 4.50.57
7 x 50.71
8 x 50.81
8.5 x 5.51.08
8 x 61.25
9 x 61.33
9 x 71.75
10 x 61.71
10 x 71.8
10 x 82.46
11 x 7.502.61
11 x 83
12 x 73.12
MM SizeCarat Weight
12 x 83
12 x 93.44
13 x 82.98
14 x 83.47
13 x 94.11
14 x 94.25
15 x 95.06
14 x 105.41
13 x 115.65
15 x 105.75
15 x 117.36
16 x 95.86
16 x 106.27
16 x 128.99
17 x 106.46
18 x 118.14
18 x 129.35
18 x 1310.21

Oval Cut

MM SizeCarat Weight
4.5 x 3.50.21
5 x 30.21
5 x 40.35
5.5 x 3.50.33
6 x 40.43
6.5 x 4.50.65
6 x 50.61
7 x 50.76
7.5 x 5.50.98
8 x 61.21
8.5 x 6.51.46
9 x 61.41
9 x 71.86
MM SizeCarat Weight
10 x 82.54
10.5 x 8.52.88
11 x 93.85
12 x 82.99
12 x 105.05
14 x 105.81
13 x 116.05
14 x 128.21
15 x 128.76
16 x 129.32
16 x 1411.88
18 x 1312.86
20 x 1514.96

Heart Cut

MM SizeCarat Weight
3.50.18
40.25
4.250.28
4.50.34
4.750.38
50.44
5.50.61
60.74
6.250.83
6.50.93
71.13
7.51.59
MM SizeCarat Weight
81.71
92.41
9.52.9
103.16
114.41
125.66
137.88
149.38
1510.79
1613.27
1815.33

Trillion Cut

MM SizeCarat Weight
30.12
3.50.16
3.750.19
40.23
4.250.27
4.50.31
4.750.37
50.42
5.250.49
5.50.55
5.750.64
60.7
MM SizeCarat Weight
6.250.75
6.50.91
6.750.98
71.1
7.51.21
81.75
92.35
113.66
124.9
136.42
159

Emerald Cut

MM SizeCarat Weight
3 x 20.1
3.5 x 20.12
4 x 20.15
4 x 30.2
5 x 30.29
5.5 x 3.50.46
5.5 x 40.48
6 x 40.66
6.5 x 4.50.88
7 x 51.06
7.25 x 5.251.24
7.5 x 5.51.45
8 x 61.74
8.5 x 6.52.17
MM SizeCarat Weight
9 x 72.62
9.5 x 7.53.21
10 x 73.01
10 x 83.79
11 x 95.21
12 x 85.34
12 x 106
13 x 96.38
14 x 86.25
14 x 108.48
13 x 119.13
14 x 1211.26
16 x 1214.22

Triangle Cut

MM SizeCarat Weight
2.50.08
30.12
3.50.18
40.25
4.250.32
4.50.37
4.750.42
50.45
5.250.53
5.50.66
5.750.71
60.76
6.250.86
6.50.94
6.751.02
MM SizeCarat Weight
71.11
7.251.32
7.51.45
7.751.69
81.79
8.251.86
92.15
9.252.54
9.753.25
103.52
114.74
126.03
138.12
149.83

Baguette Tapered Cut

MM SizeCarat Weight
2 x 1.5 x 10.025
2.5 x 1.5 x 10.035
2.5 x 1.75 x 10.04
3 x 1.5 x 10.05
3 x 1.75 x 1.250.055
3 x 1.75 x 1.30.055
3 x 1.75 x 1.50.055
3 x 2 x 10.06
3 x 2 x 1.250.065
3 x 2 x 1.50.07
3 x 2 x 1.750.075
3 x 2.5 x 20.08
3.25 x 1.75 x 10.07
3.25 x 1.75 x 1.250.05
3.5 x 1.25 x 10.04
3.5 x 1.5 x 10.05
3.5 x 1.5 x 1.250.055
3.5 x 1.7 x 1.30.055
3.5 x 1.75 x 10.06
3.5 x 1.75 x 1.250.07
3.5 x 1.75 x 1.30.065
3.5 x 2 x 1.250.08
3.5 x 2 x 1.50.09
3.5 x 2.5 x 20.09
3.75 x 2 x 1.250.08
4 x 1.5 x 10.07
4 x 1.5 x 1.20.08
4 x 1.75 x 1.250.08
4 x 2 x 1.50.1
4 x 2.5 x 1.50.12
4 x 2.5 x 20.21
4 x 3 x 20.21
4.25 x 2 x 1.250.11
MM SizeCarat Weight
4.25 x 2 x 1.50.13
4.25 x 2.5 x 1.250.13
4.25 x 2.5 x 1.50.135
4.5 x 1.75 x 1.250.15
4.5 x 2 x 1.50.12
4.5 x 2.3 x 1.80.16
4.5 x 2.5 x 20.15
4.5 x 2.75 x 1.750.15
4.5 x 3 x 20.16
4.5 x 3 x 2.50.16
4.75 x 2.5 x 1.50.15
4.75 x 3 x 20.18
5 x 2 x 10.14
5 x 2 x 1.250.15
5 x 2 x 1.50.15
5 x 2.3 x 1.80.16
5 x 2.5 x 1.50.2
5 x 2.5 x 20.21
5 x 2.75 x 20.21
5 x 3 x 20.25
5 x 3.5 x 20.26
5 x 4 x 3.50.28
5.5 x 2 x 1.50.18
5.5 x 2.5 x 1.750.23
5.5 x 2.5 x 20.23
5.5 x 3 x 20.26
5.5 x 3 x 2.250.26
5.5 x 4 x 2.50.28
6 x 2 x 1.50.3
6 x 2.5 x 1.50.3
6 x 3 x 20.3
6.5 x 2.5 x 20.3
6.5 x 3 x 20.32

Baguette Straight Cut

MM SizeCarat Weight
2 x 10.02
2 x 1.50.04
2 x 1.750.04
2.25 x 1.750.04
2.25 x 20.045
2.5 x 10.045
2.5 x 1.250.047
2.5 x 1.50.05
2.5 x 1.750.055
2.5 x 20.055
2.75 x 1.50.055
2.75 x 1.750.06
2.75 x 20.06
2.75 x 2.50.065
3 x 10.05
3 x 1.250.055
3 x 1.50.06
3 x 1.750.08
3 x 20.1
3 x 2.50.13
3.25 x 1.250.06
3.25 x 1.50.065
3.25 x 1.750.08
3.25 x 2.50.14
3.5 x 10.065
3.5 x 1.250.07
3.5 x 1.50.07
3.5 x 1.750.08
3.5 x 20.13
3.5 x 2.50.15
3.5 x 30.15
MM SizeCarat Weight
3.75 x 1.50.14
3.75 x 20.145
4 x 1.250.075
4 x 1.50.08
4 x 1.750.11
4 x 20.14
4 x 30.2
4.5 x 1.50.1
4.5 x 1.750.14
4.5 x 20.17
4.5 x 2.50.2
4.5 x 30.285
4.5 x 3.50.3
4.75 x 1.50.27
4.75 x 20.28
5 x 1.50.14
5 x 1.750.15
5 x 20.19
5 x 2.50.24
5 x 30.3
5 x 3.50.33
5 x 40.4
5.5 x 1.750.16
5.5 x 20.18
5.5 x 2.50.23
5.5 x 30.3
5.5 x 3.50.33
6 x 1.750.28
6 x 20.3
6 x 2.50.33
6 x 30.4