Elementor #3992

Diamond Carat Size Chart: MM to Carats

Size Guide : Round Cut Diamond Carat to MM Conversion Chart

Explore our comprehensive Round Cut Diamond Carat to MM Conversion Tool for precise size comparisons. Whether you're curious about the dimensions of a diamond or the carat weight of a gem, this chart eliminates inaccuracies. Perfect for buyers and sellers, it ensures accuracy from melee to large carat diamonds, preventing potential profit losses due to conversion errors. Upgrade your diamond knowledge with our user-friendly tool, making informed decisions in the world of brilliant round cut diamonds.

MM Size	Carat Weight
0.9	0.004
1	0.005
1.1	0.0067
1.2	0.0075
1.25	0.0089
1.3	0.01
1.4	0.012
1.5	0.015
1.7	0.02
1.75	0.025
1.8	0.025
2	0.03
2.1	0.035
2.2	0.035
2.25	0.04
2.4	0.05
2.5	0.06
2.75	0.07
2.8	0.08
2.9	0.09
3	0.1
3.1	0.11
3.25	0.12
3.3	0.14
3.4	0.15
3.5	0.16
3.6	0.17
3.75	0.19
3.8	0.2
3.9	0.22
4	0.23
4.1	0.25
4.2	0.3
4.25	0.315
4.4	0.33

MM Size	Carat Weight
4.5	0.35
4.6	0.38
4.8	0.4
5	0.5
5.4	0.6
5.5	0.63
5.6	0.65
5.8	0.75
6	0.8
6.4	0.95
6.5	1
6.6	1.1
6.8	1.17
7	1.25
7.2	1.33
7.4	1.5
7.5	1.55
7.6	1.6
7.8	1.75
8	1.9
8.2	2
8.4	2.15
8.6	2.25
8.5	2.35
8.8	2.5
9	2.75
9.2	2.85
9.4	3
9.6	3.15
9.8	3.35
10	3.5
10.2	3.75
10.4	4
10.6	4.25

Sieve Size Chart: Round Cut Diamond

Melee diamonds, falling within the range of 0.005 to 0.15 carats, serve as a highly cost-effective method to elevate the allure of jewelry pieces. Frequently utilized in designs such as Halo Rings and custom jewelry, these diamonds are favored for their affordability and versatility. Round Melee diamonds, in particular, boast additional characteristics that warrant careful consideration. To aid in this process, we've incorporated a Round Diamond Sieve Chart to complement the discerning choices you make in enhancing your jewelry pieces.

ROUND CUT CARAT WEIGHT	ROUND CUT MM SIZE	CTS/PCS	ROUND CUT SIEVE SIZES
0.005 ct	0.90-1.10 mm	1/200	+000/-0
0.006 ct	1.10-1.15 mm	1/175	+0/-1
0.007 ct	1.15-1.20 mm	1/150	+1/-1.5
0.008 ct	1.20-1.25 mm	1/120	+1.5/-2
0.009 ct	1.25-1.30 mm	1/100	+2/-2.5
0.01 ct	130-1.35 mm	1/100	+2.5/-3
0.011 ct	1.35-1.40 mm	1/100	+3/-3.5
0.012 ct	1.40-1.45 mm	1/80	+3.5/-4
0.013 ct	1.45-1.50 mm	1/80	+4/-4.5
0.014 ct	1.50-1.55 mm	1/70	+4.5/-5
0.016 ct	1.55-1.60 mm	1/60	+5/-5.5
0.018 ct	1.60-1.70 mm	1/50	+5.5/-6
0.021 ct	1.70-1.80 mm	1/50	+6/-6.5
0.025 ct	1.80-1.90 mm	1/40	+6.5/-7
0.029 ct	1.90-2.00 mm	1/30	+7/-7.5
0.035 ct	2.00-2.10 mm	1/30	+7.5/-8
0.039 ct	2.10-2.20 mm	1/25	+8/-8.5
0.044 ct	2.20-2.30 mm	1/25	+8.5/-9
0.052 ct	2.30-2.40 mm	1/20	+9/-9.5
0.058 ct	2.40-2.50 mm	1/20	+9.5/-10
0.069 ct	2.50-2.60 mm	1/15	+10/-10.5
0.074 ct	2.60-2.70 mm	1/15	+10.5/-11
0.078 ct	2.70-2.80 mm	1/12	+11/-11.5
0.086 ct	2.80-2.90 mm	1/12	+11.5/-12
0.095 ct	2.90-3.00 mm	1/10	+12/-12.5
0.108 ct	3.00-3.10 mm	1/10	+12.5/-13
0.116 ct	3.10-3.20 mm	1/8	+13/-13.5
0.13 ct	3.20-3.30 mm	1/8	+13.5/-14
0.145 ct	3.30-3.40 mm	1/6	+14/-14.5
0.155 ct	3.40-3.50 mm	1/6	+14.5/-15
0.165 ct	3.50-3.60 mm	1/6	+15/-15.5
0.19 ct	3.60-3.70 mm	1/5	+15.5/-15.75
0.20 ct	3.70-3.80 mm	1/5	+15.75/-16.5

Princess / Square Cut

MM Size	Carat Weight
2x2	0.06
2.25x2.25	0.08
2.5x2.5	0.1
2.75x2.75	0.13
3x3	0.15
3.25x3.25	0.2
3.5x3.5	0.23
3.75x3.75	0.25
4x4	0.3
4.42x4.42	0.35

MM Size	Carat Weight
4.5x4.5	0.4
4.75x4.75	0.5
5x5	0.63
5.25x5.25	0.75
5.5x5.5	1
6x6	1.25
6.5x6.5	1.6
7x7	2
8x8	2.25

Oval Cut

MM Size	Carat Weight
4x3	0.15
4.5x3.5	0.2
5x3	0.22
5x3.5	0.25
5x4	0.35
6x4	0.43
6.5x4.5	0.65
7x5	0.76
7.5x5.5	0.98
8x6	1.21

MM Size	Carat Weight
9x6	1.41
8.5x6.5	1.46
9x7	1.86
9.5x7.5	2.2
10x8	2.54
10x8.5	3.5
11x9	3.85
11x9.5	4.5
12x10	5.05

Marquise Cut

MM Size	Carat Weight
3x1.5	0.04
3.5x1.75	0.065
3.5x2	0.07
4x2	0.1
3.75x1.75	0.11
4.25x2.25	0.12
5x2.5	0.15
5.5x2.75	0.16
5.5x3	0.18
5x3	0.2
6.5x3	0.23
6x3	0.25
7x3	0.3
7.5x3.5	0.33
7x3.5	0.35
8x4	0.47
9x4.5	0.71
9x5	0.76
9.5x2	0.85

MM Size	Carat Weight
10x5	0.95
11x5.5	1.25
11.5x6	1.33
12x6	1.62
12x6.5	1.71
13x6.5	2.11
14x7	2.48
14x8	3
15x7.5	3.09
15x7	3.12
7x4	3.4
15x8	3.44
16x8	3.86
17x8.5	4.88
17.5x10	5.5
20x8	7.08
20x10	7.94
20x11	9.5

Emerald Cut

MM Size	Carat Weight
4x3	0.2
5x3	0.29
5.5x4	0.48
6x4	0.66
6.5x4.5	0.88
7x5	1.06
7.5x5.5	1.45
8x6	1.74
8.5x6.5	2.17

MM Size	Carat Weight
9x7	2.62
10x7	3.01
10x8	3.79
11x9	5.21
12x8	5.34
12x10	6
14x8	6.25
13x9	6.38
14x10	8.48

Asscher Cut

MM Size	Carat Weight
4	0.39
4.5	0.56
5	0.71
5.5	0.99
6	1.24
6.5	1.59
7	1.96
7.5	2.4

MM Size	Carat Weight
8	3.01
8.5	3.67
9	4.12
9.5	5.09
10	5.62
11	7.44
12	9.52
13	12.66

Heart Cut

MM Size	Carat Weight
3.5x3.5	0.18
4x4	0.25
4.25x4.25	0.28
4.5x4.5	0.34
4.75x4.75	0.38
5x5	0.44
5.5x5.5	0.61
6x6	0.74
6.25x6.25	0.83
6.5x6.5	0.93
7x7	1.13
7.5x7.5	1.59

MM Size	Carat Weight
8x8	1.71
9x9	2.41
9.5x9.5	2.9
10x10	3.16
11x11	4.41
12x12	5.66
13x13	7.88
14x14	9.38
15x15	10.79
16x16	13.27
18x18	15.33

Pear Cut

MM Size	Carat Weight
4x3	0.21
5x3	0.25
6x4	0.5
7x5	0.75
8x5	0.81

MM Size	Carat Weight
8x6	1.25
9x6	1.33
9x7	1.75
10x7	1.8
10x8	2.5

Cushion Cut

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

Radiant Cut

MM Size	Carat Weight
5x3	0.31
4.5x3.5	0.34
6x3	0.41
6x4	0.6
6.5x4.5	0.83
7x5	1.14
7.25x5.25	1.24
7.5x5.5	1.47
8x6	1.74
8.5x6.5	2.25
9x7	2.62
9.5x7.5	3.18
10x7	3.31

MM Size	Carat Weight
10x8	3.49
11x9	5.05
12x9	6.06
11.5x10	6.45
13x9	6.54
12x10	6.79
14x10	8.47
13x11	9.33
13.5x11.5	10.19
15x11	11.48
14x12	12.14
16x12	14.22

Trillion Cut

MM Size	Carat Weight
3	0.12
3.5	0.16
3.75	0.19
4	0.23
4.25	0.27
4.5	0.31
4.75	0.37
5	0.42
5.25	0.49
5.5	0.55
5.75	0.64
6	0.7

MM Size	Carat Weight
6.25	0.75
6.5	0.91
6.75	0.98
7	1.1
7.5	1.21
8	1.75
9	2.35
11	3.66
12	4.9
13	6.42
15	9

Triangle Cut

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

Baguette Cut

MM Size	Carat Weight
2x1	0.02
2x1.5	0.02
2x1.75	0.02
2.25x1	0.02
2.25x1.75	0.04
2.25x2	0.045
2.5x1	0.045
2.5x1.25	0.047
2.5x1.5	0.05
3x1	0.05
2.5x1.75	0.055
2.5x2	0.055
2.75x1.5	0.055
3x1.25	0.055
2.75x1.75	0.06
2.75x2	0.06
3x1.5	0.06
3.25x1.25	0.06
2.75x2.5	0.065
3.25x1.5	0.065
3.5x1	0.065
3.5x1.25	0.07
3.5x1.5	0.07
4x1.25	0.075
3x1.75	0.08
3.25x1.75	0.08
3.5x1.75	0.08
4x1.5	0.08
3x2	0.1
4.5x1.5	0.1
4x1.75	0.11
3x2.5	0.13

MM Size	Carat Weight
3.5x2	0.13
3.25x2.5	0.14
3.75x1.5	0.14
4x2	0.14
4.5x1.75	0.14
5x1.5	0.14
3.75x2	0.145
3.5x2.5	0.15
3.5x3	0.15
5x1.75	0.15
5.5x1.75	0.16
4.5x2	0.17
5.5x2	0.18
5x2	0.19
4x3	0.2
4.5x2.5	0.2
5.5x2.5	0.23
5x2.5	0.24
4.75x1.5	0.27
4.75x2	0.28
6x1.75	0.28
4.5x3	0.285
4.5x3.5	0.3
5x3	0.3
5.5x3	0.3
6x2	0.3
5x3.5	0.33
5.5x3.5	0.33
6x2.5	0.33
5x4	0.4
6x3	0.4

Tapered Baguette Cut

MM Size	Carat Weight
2x1.5x1	0.025
2.5x1.5x1	0.035
2.5x1.75x1	0.04
3.5x1.25x1	0.04
3x1.5x1	0.05
3.25x1.75x1.25	0.05
3.5x1.5x1	0.05
3x1.75x1.25	0.055
3x1.75x1.3	0.055
3x1.75x1.5	0.055
3.5x1.5x1.25	0.055
3.5x1.7x1.3	0.055
3x2x1	0.06
3.5x1.75x1	0.06
3x2x1.25	0.065
3.5x1.75x1.3	0.065
3x2x1.5	0.07
3.25x1.75x1	0.07
3.5x1.75x1.25	0.07
4x1.5x1	0.07
3x2x1.75	0.075
3x2.5x2	0.08
3.5x2x1.25	0.08
3.75x2x1.25	0.08
4x1.5x1.2	0.08
4x1.75x1.25	0.08
3.5x2x1.5	0.09
3.5x2.5x2	0.09
4x2x1.5	0.1
4.25x2x1.25	0.11
4x2.5x1.5	0.12
4.5x2x1.5	0.12
4.25x2x1.5	0.13

MM Size	Carat Weight
4.25x2.5x1.25	0.13
4.25x2.5x1.5	0.135
5x2x1	0.14
4.5x1.75x1.25	0.15
4.5x2.5x2	0.15
4.5x2.75x1.75	0.15
4.75x2.5x1.5	0.15
5x2x1.25	0.15
5x2x1.5	0.15
4.5x2.3x1.8	0.16
4.5x3x2	0.16
4.5x3x2.5	0.16
5x2.3x1.8	0.16
4.75x3x2	0.18
5.5x2x1.5	0.18
5x2.5x1.5	0.2
4x2.5x2	0.21
4x3x2	0.21
5x2.5x2	0.21
5x2.75x2	0.21
5.5x2.5x1.75	0.23
5.5x2.5x2	0.23
5x3x2	0.25
5x3.5x2	0.26
5.5x3x2	0.26
5.5x3x2.25	0.26
5x4x3.5	0.28
5.5x4x2.5	0.28
6x2x1.5	0.3
6x2.5x1.5	0.3
6x3x2	0.3
6.5x2.5x2	0.3
6.5x3x2	0.32

Carat Weight

Used in weighing precious and semi-precious stones
1 carat	= 0.20 grams
1 gram	= 5 carats
1 carat	= 100 points