Know your stone carat size and weight from measurements.
by Lalit Mac
on
Mar 25, 2021
You made a great choice as you decided to go with our simulated cubic zirconia (a great alternative to the Real Diamonds). Now it’s time to pick your favorite shape, mm size, carat weight and more. Click on the the cut below to view its millimeter to carat conversion chart.
Round
Princess
Marquise
Radiant
Cushion
Pear
Oval
Heart
Emerald
Triangle
Round
MM Size
Carat Weight
0.8
0.0025
1
0.005
1.12
0.0075
1.15
0.0067
1.25
0.01
1.3
0.01
1.5
0.015
1.75
0.02
1.8
0.025
2
0.03
2.25
0.04
2.5
0.06
2.75
0.08
3
0.11
3.25
0.14
3.5
0.17
3.75
0.21
4
0.25
4.25
0.28
4.5
0.36
4.75
0.44
5
0.46
5.25
0.56
5.5
0.66
5.75
0.76
6
0.84
6.25
0.93
6.5
1.03
6.75
1.24
MM Size
Carat Weight
7
1.28
7.25
1.49
7.5
1.67
7.75
1.75
8
2.04
8.25
2.11
8.5
2.43
8.75
2.55
9
2.75
9.25
3.05
9.5
3.35
9.75
3.61
10
3.87
10.25
4.16
10.5
4.41
10.75
4.57
11
4.91
11.25
5.49
11.5
5.85
12
6.84
12.25
7.26
12.5
7.36
12.75
7.52
13
8.51
13.5
9.53
14
10.49
15
12.89
16
16.06
Princess
MM Size
Carat Weight
1.5
0.015
1.75
0.03
2
0.06
2.25
0.08
2.5
0.1
2.75
0.13
3
0.18
3.25
0.26
3.5
0.29
3.75
0.31
4
0.39
4.25
0.44
4.5
0.56
4.75
0.64
5
0.71
5.25
0.75
5.5
0.99
5.75
1.11
6
1.24
6.25
1.39
MM Size
Carat Weight
6.5
1.59
6.75
1.75
7
1.96
7.25
2.01
7.5
2.4
7.75
2.74
8
3.01
8.25
3.24
8.5
3.67
8.75
4.1
9
4.12
9.5
5.09
9.75
5.36
10
5.62
10.25
5.76
10.5
5.99
11
7.44
11.5
9.44
12
9.52
Marquise
MM Size
Carat Weight
3 x 1.5
0.025
3.5 x 1.75
0.065
3.5 x 2
0.07
3.75 x 1.75
0.11
4 x 2
0.1
4.25 x 2.25
0.12
5 x 2.5
0.14
5 x 3
0.2
5.5 x 2.75
0.16
5.5 x 3
0.18
6 x 3
0.25
6.5 x 3
0.23
7 x 3
0.3
7 x 3.5
.35
7 x 4
.34
7.5 x 3.5
0.33
8 x 4
0.47
9 x 4.5
0.71
MM Size
Carat Weight
9 x 5
0.76
9.5 x 2
0.85
10 x 5
0.95
11 x 5.5
1.25
11.5 x 6
1.33
12 x 6
1.62
12 x 6.5
1.71
13 x 6.5
2.11
14 x 7
2.48
15 x 7.5
3.09
14 x 8
3
15 x 7
3.12
15 x 8
3.44
16 x 8
3.86
17 x 8.5
4.88
17.5 x 10
5.5
20 x 8
7.08
20 x 10
7.94
20 x 11
9.5
Radiant
MM Size
Carat Weight
4.5 x 3.5
0.34
5 x 3
0.31
6 x 3
0.41
6 x 4
.60
6.5 x 4.5
0.83
7 x 5
1.14
7.25 x 5.25
1.24
7.5 x 5.5
1.47
8 x 6
1.74
8.5 x 6.5
2.25
9 x 7
2.62
9.5 x 7.5
3.18
10 x 7
3.31
MM Size
Carat Weight
10 x 8
3.49
11 x 9
5.05
11.5 x 10
6.45
12 x 9
6.06
12 x 10
6.79
13 x 9
6.54
13 x 11
9.33
13.5 x 11.5
10.19
14 x 10
8.47
14 x 12
12.14
15 x 11
11.48
16 x 12
14.22
Cushion
MM Size
Carat Weight
4
0.25
4.5
0.36
5
0.46
5.25
0.56
5.5
0.66
5.75
0.76
6
0.84
6.25
0.93
6.5
1.03
6.75
1.24
7
1.28
7.5
1.67
MM Size
Carat Weight
8
2.04
8.5
2.43
9
2.75
9.5
3.35
10
3.87
10.5
4.41
11
4.91
11.5
5.85
12
6.84
13
8.51
14
10.49
15
12.89
Pear
MM Size
Carat Weight
3 x 2
0.13
4 x 2.5
0.18
4 x 3
0.21
5 x 3
0.25
5 x 4
0.35
6 x 4
0.39
6.5 x 4.5
0.57
7 x 5
0.71
8 x 5
0.81
8.5 x 5.5
1.08
8 x 6
1.25
9 x 6
1.33
9 x 7
1.75
10 x 6
1.71
10 x 7
1.8
10 x 8
2.46
11 x 7.50
2.61
11 x 8
3
12 x 7
3.12
MM Size
Carat Weight
12 x 8
3
12 x 9
3.44
13 x 8
2.98
14 x 8
3.47
13 x 9
4.11
14 x 9
4.25
15 x 9
5.06
14 x 10
5.41
13 x 11
5.65
15 x 10
5.75
15 x 11
7.36
16 x 9
5.86
16 x 10
6.27
16 x 12
8.99
17 x 10
6.46
18 x 11
8.14
18 x 12
9.35
18 x 13
10.21
Oval
MM Size
Carat Weight
4.5 x 3.5
0.21
5 x 3
0.21
5 x 4
0.35
5.5 x 3.5
0.33
6 x 4
0.43
6.5 x 4.5
0.65
6 x 5
0.61
7 x 5
0.76
7.5 x 5.5
0.98
8 x 6
1.21
8.5 x 6.5
1.46
9 x 6
1.41
9 x 7
1.86
MM Size
Carat Weight
10 x 8
2.54
10.5 x 8.5
2.88
11 x 9
3.85
12 x 8
2.99
12 x 10
5.05
14 x 10
5.81
13 x 11
6.05
14 x 12
8.21
15 x 12
8.76
16 x 12
9.32
16 x 14
11.88
18 x 13
12.86
20 x 15
14.96
Heart
MM Size
Carat Weight
3.5
0.18
4
0.25
4.25
0.28
4.5
0.34
4.75
0.38
5
0.44
5.5
0.61
6
0.74
6.25
0.83
6.5
0.93
7
1.13
7.5
1.59
MM Size
Carat Weight
8
1.71
9
2.41
9.5
2.9
10
3.16
11
4.41
12
5.66
13
7.88
14
9.38
15
10.79
16
13.27
18
15.33
Emerald
MM Size
Carat Weight
3 x 2
0.1
3.5 x 2
0.12
4 x 2
0.15
4 x 3
0.2
5 x 3
0.29
5.5 x 3.5
0.46
5.5 x 4
0.48
6 x 4
0.66
6.5 x 4.5
0.88
7 x 5
1.06
7.25 x 5.25
1.24
7.5 x 5.5
1.45
8 x 6
1.74
8.5 x 6.5
2.17
MM Size
Carat Weight
9 x 7
2.62
9.5 x 7.5
3.21
10 x 7
3.01
10 x 8
3.79
11 x 9
5.21
12 x 8
5.34
12 x 10
6
13 x 9
6.38
14 x 8
6.25
14 x 10
8.48
13 x 11
9.13
14 x 12
11.26
16 x 12
14.22
Triangle
MM Size
Carat Weight
2.5
0.08
3
0.12
3.5
0.18
4
0.25
4.25
0.32
4.5
0.37
4.75
0.42
5
0.45
5.25
0.53
5.5
0.66
5.75
0.71
6
0.76
6.25
0.86
6.5
0.94
6.75
1.02
MM Size
Carat Weight
7
1.11
7.25
1.32
7.5
1.45
7.75
1.69
8
1.79
8.25
1.86
9
2.15
9.25
2.54
9.75
3.25
10
3.52
11
4.74
12
6.03
13
8.12
14
9.83