Dynasty Jewelry Carat Weight & mm. Size Chart

DynastyJewelry Jewelry Guide: Diamond Carat Weight & mm. Size ChartCarats are the traditional measuring unit of a diamond's weight.

Carats are the traditional measuring unit of a diamond's weight, one carat equaling 200 milligrams, in other words one gram equaling five carats. A carat is divided into 100 'points,' like one dollar divided into 100 cents, so the same diamond can be represented as weighing a carat and a half, 150 points or 1.50 carats.

Two terms, carat and karat are often confused. Karat refers to the fineness of gold alloys (pure gold is 24 karat; 14 karat or 14Kt. is 14 parts gold and 10 parts other metals) and Carat refers to gem weights, 1.05 Carat or 1.05 Ct. 
 

Diamond Carat Weight / Diameter mm. size Table :
The following table gives an approximate guide to the relative size in millimetres, and weight of modern round brilliant cut and fancy cut diamonds of ideal proportions.

Jewelry Guide: Millimeter to Inch Converter Chart

	Round Cut
Milimeters	Carat weight	Points / Cents
1.0	0.005	0.5
1.3	0.01	1
1.5	0.015	1.5
1.7	0.02	1
1.8	0.025	2.5
2.0	0.03	3
2.1	0.035	3.5
2.2	0.04	4
2.4	0.05	5
2.5	0.06	6
2.7	0.07	7
2.8	0.08	8
2.9	0.09	9
3.0	0.10	10
3.1	0.11	11
3.2	0.12	12
3.3	0.14	14
3.4	0.15	15
3.5	0.16	16
3.6	0.17	17
3.7	0.18	18
3.8	0.20	20
3.9	0.22	22
4.0	0.25	25
4.2	0.30	30
4.4	0.33	33
4.5	0.35	35
4.6	0.38	38
4.8	0.40	40
5.0	0.50	50
5.4	0.60	60
5.5	0.63	63
5.6	0.65	65
6.0	0.75	75
6.4	0.95	95
6.6	1.00	100
6.8	1.17	117
7.0	1.25	125
7.2	1.33	133
7.5	1.55	155
7.8	1.75	175
8.0	2.00	200
8.4	2.15	215
8.6	2.25	225
9.0	2.75	275
9.4	3.00	300
9.6	3.15	315
9.8	3.35	335
10.0	3.50	350
10.2	3.75	375
10.4	4.00	400
10.6	4.25	425
10.8	4.5	450
11.0	4.75	475
11.2	5.00	500
12.0	6.50	650

	Oval Cut
Milimeters	Carat weight	Points
4 x 3	0.20	20
5 x 3	0.25	25
5 x 3.5	0.33	33
5 x 4	0.40	40
6 x 4	0.50	50
6.5 x 4.5	0.65	65
7 x 5	0.75	75
7.5 x 5.5	1.00	100
8 x 6	1.25	125
8.5 x 6.5	1.50	150
9 x 6	1.75	175
9 x 7	2.00	200
9.5 x 7.5	2.5	250
10 x 8	3.00	300
10 x 8.5	3.5	350
11 x 9	4.00	400
11 x 9.5	4.50	450
12 x 10	5.00	500

	Marquise Cut
Milimeters	Carat weight	Points
3.5 x 1.5	0.07	7
4 x 2	0.10	10
5 x 2	0.20	20
5 x 3	0.22	22
5.5 x 2.5	0.25	25
6 x 6	0.30	30
7 x 3	0.35	35
7 x 3.5	0.38	38
7 x 4	0.40	40
8 x 4	0.50	50
8.5 x 4.5	0.65	65
9 x 4	.70	70
9 x 4.5	0.75	75
9 x 5	0.80	80
9.5 x 4.5	0.85	85
10 x 4.75	1.00	100
10 x 5	1.25	125
11 x 5	1.50	150
11 x 5.5	1.65	165
12 x 6	2.00	200
13 x 5.5	2.50	250
13 x 6	2.65	265
14 x 6.5	2.87	287
14 x 7	3.00	300
15 x 7	3.75	375
16 x 8	4.50	450
18 x 9	7.00	700
20 x 10	10	1000

	Princess Cut
Milimeters	Carat weight	Points
2.00	0.06	6
2.25	0.08	8
2.50	0.10	10
2.75	0.13	13
3.0	0.15	15
3.25	0.20	20
3.5	0.23	23
3.75	0.25	25
4.0	0.30	30
4.42	0.35	35
4.5	0.40	40
4.75	0.50	50
5.0	0.63	63
5.25	0.75	75
5.5	1.00	100
6.0	1.25	125
7.0	1.60	160
8.0	2.25	225

	Emerald Cut
Milimeters	Carat weight	Points
4 x 3	0.20	20
5 x 3	0.25	25
6 x4	0.50	50
6.5 x 4.5	0.75	75
7 x 5	1.00	100
8 x 6	1.50	150
8.5 x 6.5	2.00	200
9 x 7	2.50	250
10 x 8	3.00	300
11 x 9	4.00	400
12 x 10	5.00	500

	Pear Cut
Milimeters	Carat weight	Points
4 x 2	0.20	20
5 x 3	0.30	30
6 x 4	0.50	50
7 x 5	0.75	75
8 x 5	1.00	100
9 x 6	1.50	150
10 x 7	2.00	200
12 x 7	2.50	250
12 x 8	3.00	300
13 x 8	3.50	350
14 x 8	4.00	400
15 x 9	5.00	500

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