Gemstone Approx. Weight by Cut

MM Size	Approx. Carat Weight
ROUND CUT
1.0 mm	0.005 ct
1.15 mm	0.0067 ct
1.3 mm	0.01 ct
1.5 mm	0.015 ct
1.7 mm	0.02 ct
1.8 mm	0.025 ct
2.00 mm	0.03 ct
2.10 mm	0.035 ct
2.2 mm	0.04 ct
2.25 mm	0.043 ct
2.40 mm	0.05 ct
2.50 mm	0.06 ct
2.70 mm	0.07 ct
2.80 mm	0.08 ct
2.90 mm	0.09 ct
3.00 mm	0.10 ct
3.10 mm	0.11 ct
3.20 mm	0.12 ct
3.30 mm	0.13 ct
3.40 mm	0.15 ct
3.50 mm	0.16 ct
4.00 mm	0.25 ct
4.10 mm	0.26 ct
4.50 mm	0.33 ct
5.00 mm	0.50 ct
5.50 mm	0.65 ct
6.00 mm	0.75 ct
6.50 mm	1.00 ct
7.00 mm	1.25 ct
8.00 mm	2.00 ct
9.00 mm	2.75 ct
10.00 mm	3.50 ct
11.00 mm	4.60 ct
12.00 mm	6.00 ct
13.00 mm	7.75 ct
14.00 mm	9.60 ct
15.00 mm	11.80 ct
16.00 mm	14.40 ct
17.00 mm	17.25 ct
18.00 mm	20.50 ct
19.00 mm	24.00 ct
20.00 mm	28.00 ct
21.00 mm	34.80 ct
22.00 mm	41.80 ct
23.00 mm	49.80 ct
24.00 mm	57.90 ct
25.00 mm	68.70 ct
EMERALD CUT
4.0 x 3.0 mm	0.25 ct
4.5 x 3.0 mm	0.28
6 x 4 mm	0.50 ct
7 x 5 mm	1.00 ct
8 x 6 mm	1.50 ct
9 x 7 mm	2.50 ct
10 x 8 mm	3.00 ct
11 x 9 mm	4.00 ct
12 x 10 mm	5.00 ct
14 x 10 mm	6.00 ct
14 x 12 mm	8.00 ct
16 x 12 mm	10.50 ct
18 x 13 mm	14.20 ct
20 x 15 mm	20.30 ct
25 x 18 mm	52.20 ct
OVAL CUT
4 x 3 mm	0.20 ct
5 x 3 mm	0.26 ct
5 x 4 mm	0.33 ct
6 x 4 mm	0.50 ct
7 x 5 mm	1.00 ct
8 x 6 mm	1.50 ct
9 x 7 mm	2.50 ct
10 x 8 mm	3.00 ct
11 x 9 mm	4.00 ct
12 x 10 mm	5.00 ct
14 x 10 mm	6.00 ct
14 x 12 mm	8.00 ct
16 x 12 mm	10.50 ct
18 x 13 mm	14.20 ct
20 x 15 mm	20.30 ct
22 x 15 mm	23.50 ct
23 x 17 mm	32.20 ct
25 x 18 mm	43.00 ct
27 x 20 mm	58.50 ct
30 x 22 mm	79.60 ct
PEAR CUT
3.0 x 2.5 mm	0.08 ct
4.0 x 2.5 mm	0.10 ct
4.0 x 3.0 mm	0.14 ct
4.5 x 3.0 mm	0.16 ct
5 x 3 mm	0.20 ct
6 x 4 mm	0.36 ct
7 x 5 mm	0.75 ct
8 x 5 mm	1.00 ct
9 x 6 mm	1.50 ct
10 x 7 mm	2.00 ct
11 x 7 mm	2.25 ct
12 x 8 mm	3.00 ct
13 x 9 mm	3.50 ct
15 x 10 mm	5.50 ct
16 x 12 mm	8.60 ct
18 x 13 mm	11.20 ct
20 x 15 mm	17.30 ct
22 x 15 mm	18.70 ct
25 x 18 mm	30.60 ct
30 x 22 mm	54.50 ct
MARQUISE CUT
2.5 x 1.25 mm	0.02 ct
3.0 x 1.5 mm	0.03 ct
3.5 x 1.75 mm	0.05
3.5 x 2.0 mm	0.07 ct
4 x 2 mm	0.078 ct
4.25 x 2.25 mm	0.10 ct
5 x 2.5 mm	0.15 ct
6 x 3 mm	0.23 ct
7 x 3.5 mm	0.35 ct
8 x 4 mm	0.50 ct
10 x 5 mm	1.00 ct
12 x 6 mm	2.00 ct
14 x 7 mm	3.00 ct
16 x 8 mm	4.00 ct
18 x 9 mm	6.00 ct
20 x 10 mm	8.50 ct
HEART CUT
3.0 x 3.0 mm	0.12 ct
3.5 x 3.5 mm	0.20 ct
4 x 4 mm	0.25 ct
4.5 x 4.5 mm	0.33 ct
6 x 6 mm	0.75 ct
7 x 7 mm	1.50 ct
8 x 8 mm	2.00 ct
9 x 9 mm	3.00 ct
10 x 10 mm	4.00 ct
11 x 11 mm	5.00 ct
12 x 12 mm	7.00 ct
13 x 13 mm	9.30 ct
14 x 14 mm	11.60 ct
15 x 15 mm	14.40 ct
16 x 16 mm	17.40 ct
SQUARE / PRINCESS CUT
1.25 x 1.25 mm	0.014 ct
1.5 x 1.5 mm	0.02 ct
1.75 x 1.75 mm	0.03 ct
2 x 2 mm	0.05 ct
2.25 x 2.25 mm	0.08 ct
2.5 x 2.5 mm	0.10 ct
2.75 x 2.75 mm	0.12 ct
3 x 3 mm	0.17 ct
3.25 x 3.25 mm	0.21 ct
3.5 x 3.5 mm	0.22 ct
3.75 x 3.75 mm	0.31 ct
4 x 4 mm	0.37 ct
5 x 5 mm	0.75 ct
6 x 6 mm	1.30 ct
7 x 7 mm	2.00 ct
8 x 8 mm	2.90 ct
9 x 9 mm	4.40 ct
10 x 10 mm	6.00 ct
11 x 11 mm	8.00 ct
12 x 12 mm	10.35 ct
13 x 13 mm	13.20 ct
14 x 14 mm	16.50 ct
15 x 15 mm	20.25 ct
16 x 16 mm	24.60 ct
TRILLION CUT
3 x 3 mm	0.10 ct
3.5 3.5 mm	0.13 ct
4 x 4 mm	0.19 ct
4.5 x 4.5 mm	0.25 ct
5 x 5 mm	0.34 ct
5.5 x 5.5 mm	0.44 ct
6 x 6 mm	0.55 ct