Diamond MM to Carat Conversions

see approximately what your diamonds measure or weigh.

Baguette Straight Cut

MM Size
Carat Weight
MM Size
Carat Weight
2 x 1
0.02
3.75 x 1.5
0.08
2 x 1.5
0.03
3.75 x 2
0.1
2 x 1.75!
0.04
4 x 1.25
0.04
2.25 x 1.75
0.04
4 x 1.5
0.07
2.25 x 2
0.045
4 x 1.75
0.09
2.5 x 1
0.03
4 x 2
0.13
2.5 x 1.25
0.04
4 x 3
0.24
2.5 x 1.5
0.05
4.5 x 1.5
0.1
2.5 x 1.75
0.06
4.5 x 1.75
0.12
2.5 x 2
0.07
4.5 x 2
0.17
2.75 x 1.5
0.065
4.5 x 2.5
0.2
2.75 x 1.75
0.07
4.5 x 3
0.285
2.75 x 2
0.08
4.5 x 3.5
0.3
2.75 x 2.5
0.11
4.75 x 1.5
0.13
3 x 1
0.03
4.75 x 2
0.14!
3 x 1.25
0.045
5 x 1.5
0.14
3 x 1.5
0.05
5 x 1.75!
0.15!
3 x 1.75
0.08
5 x 2
0.18!
3 x 2
0.1
5 x 2.5
0.24
3 x 2.5
0.13
5 x 3
0.3
3.25 x 1.25
0.06
5 x 3.5
0.38
3.25 x 1.5
0.065
5 x 4
0.5
3.25 x 1.75
0.08
5.5 x 1.75
0.16
3.25 x 2.5
0.13
5.5 x 2
0.18
3.5 x 1
0.055
5.5 x 2.5
0.3
3.5 x 1.25
0.06
5.5 x 3
0.36
3.5 x 1.5
0.07
5.5 x 3.5
0.5
3.5 x 1.75
0.08
6 x 1.75
0.23
3.5 x 2
0.09
6 x 2
0.28
3.5 x 2.5
0.15
6 x 2.5
0.36
3.5 x 3
0.15
6 x 3
0.4

Radiant Cut

MM Size
Carat Weight
MM Size
Carat Weight
4.5 x 3.5
0.34
10 x 8
3.49
5 x 3
0.31
11 x 9
5.05
6 x 3
0.41
11.5 x 10
6.45
6 x 4
0.7
12 x 9
6.06
6.5 x 4.5
0.9
12 x 10
6.79
7 x 5
1.14
13 x 9
6.54
7.25 x 5.25
1.24
13 x 11
9.33
7.5 x 5.5
1.47
13.5 x 11.5
10.19
8 x 6
1.74
14 x 10
8.47
8.5 x 6.5
2.25
14 x 12
12.14
9 x 7
2.62
15 x 11
11.48
9.5 x 7.5
3.18
16 x 12
14.22
10 x 7
3.31

Princess / Square Cut

MM Size
Carat Weight
MM Size
Carat Weight
1.40
0.025
3.40
0.25
1.50
0.03
3.50
0.27
1.60
0.033
3.60
0.29
1.70
0.037
3.70
0.33
1.80
0.4
3.80
0.35
1.90
0.045
3.90
0.37
2.00
0.05
4.00
0.4
2.10
0.06
4.10
0.42
2.20
0.07
4.20
0.45
2.30
0.075
4.30
0.5
2.40
0.08
4.40
0.6
2.50
0.095
4.75
0.75
2.60
0.105
5.00
0.8
2.70
0.12
5.50
0.9
2.80
0.14
6.00
1.0
2.90
0.16
6.50
1.25
3.00
0.18
7.00
1.5
3.10
0.19
7.50
2.0
3.20
0.2
8.00
3.0
3.30
0.2 0.22
8.80
4.0

Emerald Cut

MM Size
Carat Weight
MM Size
Carat Weight
3 x 2
0.1
9 x 7
2.62
3.5 x 2
0.12
9.5 x 7.5
3.21
4 x 2
0.15
10 x 7
3.01
4 x 3
0.25
10 x 8
3.79
5 x 3
0.34
11 x 9
5.21
5.5 x 3.5
0.46
12 x 8
5.34
5.5 x 4
0.52
12 x 10
6
6 x 4
0.7
13 x 9
6.38
6.5 x 4.5
0.95
14 x 8
6.25
7 x 5
1.06
14 x 10
8.48
7.25 x 5.25
1.24
13 x 11
9.13
7.5 x 5.5
1.45
14 x 12
11.26
8 x 6
1.74
16 x 12
14.22
8.5 x 6.5
2.17

Asscher Cut

MM Size
Carat Weight
MM Size
Carat Weight
4
0.4
8
3.01
4.5
0.56
8.5
3.67
5
0.8
9
4.12
5.5
0.99
9.5
5.09
6
1.24
10
5.62
6.5
1.59
11
7.44
7
1.96
12
9.52
7.5
2.4
13
12.66

Baguette Tapered Cut

MM Size
Carat Weight
MM Size
Carat Weight
2 x 1.5 x 1
0.025
4.25 x 2 x 1.5
0.13
2.5 x 1.5 x 1
0.03
4.25 x 2.5 x 1.25
0.13
2.5 x 1.75 x 1
0.035
4.25 x 2.5 x 1.5
0.135
3 x 1.5 x 1
0.04
4.5 x 1.75 x 1.25
0.15
3 x 1.75 x 1.25
0.05
4.5 x 2 x 1.5
0.12
3 x 1.75 x 1.3
0.055
4.5 x 2.3 x 1.8
0.16
3 x 1.75 x 1.5
0.055
4.5 x 2.5 x 2
0.15
3 x 2 x 1
0.07
4.5 x 2.75 x 1.75
0.15
3 x 2 x 1.25
0.07
4.5 x 3 x 2
0.16
3 x 2 x 1.5
0.07
4.5 x 3 x 2.5
0.16
3 x 2 x 1.75
0.075
4.75 x 2.5 x 1.5
0.15
3 x 2.5 x 2
0.08
4.75 x 3 x 2
0.18
3.25 x 1.75 x 1
0.07
5 x 2 x 1
0.14
3.25 x 1.75 x 1.25
0.05
5 x 2 x 1.25
0.15
3.5 x 1.25 x 1
0.04
5 x 2 x 1.5
0.15
3.5 x 1.5 x 1
0.05
5 x 2.3 x 1.8
0.16
3.5 x 1.5 x 1.25
0.055
5 x 2.5 x 1.5
0.2
3.5 x 1.7 x 1.3
0.055
5 x 2.5 X 2
0.21
3.5 x 1.75 x 1
0.06
5 x 2.75 x 2
0.21
3.5 x 1.75 x 1.25
0.07
5 x 3 x 2
0.25
3.5 x 1.75 x 1.3
0.065
5 x 3.5 x 2
0.26
3.5 x 2 x 1.25
0.08
5 x 4 x 3.5
0.28
3.5 x 2 x 1.5
0.09
5.5 x 2 x 1.5
0.18
3.5 x 2.5 x 2
0.09
5.5 x 2.5 x 1.75
0.23
3.75 x 2 x 1.25
0.08
5.5 x 2.5 x 2
0.23
4 x 1.5 x 1
0.07
5.5 x 3 x 2
0.26
4 x 1.5 x 1.2
0.08
5.5 x 3 x 2.25
0.26
4 x 1.75 x 1.25
0.08
5.5 x 4 x 2.5
0.28
4 x 2 x 1.5
0.1
6 x 2 x 1.5
0.3
4 x 2.5 x 1.5
0.1
6 x 2.5 x 1.5
0.3
4 x 2.5 x 2
0.21
6 x 3 x 2
0.3
4 x 3 x 2
0.21
6.5 x 2.5 x 2
4.25 x 2 x 1.25
0.11
6.5 x 3 x 2
0.32

Heart Cut

MM Size
Carat Weight
MM Size
Carat Weight
3.5
0.18
8
1.71
4
0.25
9
2.41
4.25
0.28
9.5
2.9
4.5
0.34
10
3.16
4.75
0.38
11
4.41
5
0.44
12
5.66
5.5
0.61
13
7.88
6
0.74
14
9.38
6.25
0.83
15
10.79
6.5
0.93
16
13.27
7
1.13
18
15.33
7.5
1.59

Pear Cut

MM Size
Carat Weight
MM Size
Carat Weight
3 x 2
0.13
12 x 8
3
4 x 2.5
1.18
12 x 9
3.44
4 x 3
0.21
13 x 8
2.98
5 x 3
0.25
14 x 8
3.47
5 x 4
0.35
13 x 9
4.11
6 x 4
0.39
14 x 9
4.25
6.5 x 4.5
0.57
15 x 9
5.06
7 x 5
0.71
14 x 10
5.41
8 x 5
0.81
13 x 11
5.65
8.5 x 5.5
1.08
15 x 10
5.75
8 x 6
1.25
15 x 11
7.36
9 x 6
1.33
16 x 9
5.86
9 x 7
1.75
16 x 10
6.27
10 x 6
1.71
16 x 12
8/99
10 x 7
1.8
17 x 10
6.46
10 x 8
1.8
18 x 11
8.14
11 x 7.5
2.61
18 x 12
9.35
11 x 8
3
18 x 13
10.21
12 x 7
3.12

Cushion Cut

MM Size
Carat Weight
MM Size
Carat Weight
4
0.25
8
2.04
4.5
0.36
8.5
2.43
5
0.46
9
2.75
5.25
0.56
9.5
3.35
5.5
0.66
10
3.87
5.75
0.76
10.5
4.41
6
0.84
11
4.91
6.25
0.93
11.5
5.85
6.5
1.03
12
6.84
6.75
1.24
13
8.51
7
1.28
14
10.49
7.5
1.67
15
12.89

Round Cut

MM Size
Carat Weight
MM Size
Carat Weight
0.8
0.0025
7
1.28
1
0.005
7.25
1.49
1.12
0.0075
7.5
1.67
1.15
0.0067
7.75
1.75
1.25
0.01
8
2.04
1.3
0.01
8.25
2.11
1.5
0.015
8.5
2.43
1.75
0.02
8.75
2.55
1.8
0.025
9
2.75
2
0.03
9.25
3.05
2.25
0.04
9.5
3.35
2.5
0.06
9.75
3.61
2.75
0.08
10
3.87
3
0.11
10.25
4.16
3.25
0.14
10.5
4.41
3.5
0.17
10.75
4.57
3.75
0.21
11
4.91
4
0.25
11.25
5.49
4.25
0.28
11.5
5.85
4.25
0.36
12
6.84
4.75
0.44
12.25
7.26
5
0.46
12.5
7.36
5.25
0.56
12.75
7.52
5.5
0.66
13
8.51
5.75
0.76
13.5
9.53
6
0.84
14
10.49
6.25
0.93
15
12.89
6.5
1.03
16
16.06
6.75
1.24

Marquise Cut

MM Size
Carat Weight
MM Size
Carat Weight
3 x 1.5
0.025
9 x 5
0.76
3.5 x 1.75
0.065
9.5 x 2
0.85
3.5 x 2
0.07
10 x 5
0.85
3.75 x 1.75
0.11
11 x 5.5
1.25
4 x 2
0.1
11.5 x 6
1.33
4.25 x 2.25
0.12
12 x 6
1.62
5 x 2.5
0.14
12 x 6.5
1.71
5 x 3
0.2
12 x 6.5
2.11
5.5 x 2.75
0.16
14 x 7
2.48
5.5 x 3
0.18
15 x 7.5
3.09
6 x 3
0.25
14 x 8
3
6.5 x 3
0.23
15 x 7
3.12
7 X 3
0.3
15 x 8
3.44
7 x 3.5
0.35
16 x 8
3.44
7 x 4
3.4
17 x 8.5
4.88
7.5 x 3.5
0.33
17.5 x 10
4.88
8 x 4
0.47
20 x 8
7.08
9 x 4.5
0.71
20 x 10
7.94
20 x 11
7.94

Oval Cut

MM Size
Carat Weight
MM Size
Carat Weight
4.5 x 3.5
0.21
10 x 6
2.54
5 x 3
0.21
10.5 x 8.5
2.88
5 x 4
0.35
11 x 9
3.85
5.5 x 3.5
0.33
12 x 8
2.99
6 x 4
0.43
12 x 10
5.05
6.5 x 4.5
0.65
14 x 10
5.81
6 x 5
0.61
13 x 11
6.05
7 x 5
0.76
14 x 12
8.21
7.5 x 5.5
0.98
14 x 12
8.76
8 x 6
1.21
16 x 12
9.32
8.5 x 6.5
1.46
16 x 14
11.88
9 x 6
1.41
18 x 13
12.86
9 x 7
1.86
20 x 15
14.96