MM To Carat Weight Chart

MM To Carat Conversion Table here gives you the idea in what size the stone may weigh. The word 'carat' comes from the 'carob' seed, which was originally used to measure the weight of diamonds. A carat (ct) is equal to 0.2 grams. Cart is unrelated to similar sounding karat which is used to measure the purity of gold. Given here is the MM To Carat Weight Chart, which provides the weight of the gemstones in carat (ct) against different sizes of the stones.

MM To Carat Conversion Table

Rounds Squares Ovals Emerald Pear Marquis
Size (mm)Weight (carat) Size (mm)Weight (carat) Size (mm)Weight (carat) Size (mm)Weight (carat) Size (mm)Weight (carat) Size (mm)Weight (carat)
1.6 .02 5 .75 5x3 .25 6x4 .5 6x5 .7 4x2 .10
2 .03 6 1.3 6x4 .5 7x5 1.0 7x5 .75 5x2.5 .25
2.5 .06 7 2.05 7x5 1.0 8x6 1.5 8x5 1.0 6x3 .30
3 .10 8 2.9 8x6 1.5 9x7 2.5 9x6 1.5 8x4 .75
3.5 .16 9 4.4 9x7 2.5 10x8 3.0 10x7 2.0 10x5 1.0
4 .25 10 6.0 10x8 3.0 11x9 4.0 11x7 2.25 12x6 2.0
4.5 .33 11 8.0 11x9 4.0 12x10 5.0 12x8 3.0 14x7 3.0
5 .50 12 10.35 12x10 5.0 14x10 6.0 13 x9 3.5 16x8 4.0
5.5 .65 13 13.2 14x10 6.0 14x12 8.0 15x10 5.5 18x9 6.0
6 .75 14 16.5 14x12 8.0 16x12 10.5 16x12 8.6 20x10 8.5
6.5 1.0 15 20.25 16x12 10.5 18x13 14.2 18x13 12
7 1.25 16 24.6 18x13 14.2 20x15 20.3 20x15 17.3
8 2.0 20x15 20.3 25x18 52.2 22x15 18.7
9 2.75 22x15 23.5 25x18 30.6
10 3.5 23x17 32.2 30x22 54.5
11 4.6 25x18 43.0
12 6.0 27x20 58.5
13 7.75 30x22 79.6
14 9.65
15 11.85
16 14.35
17 17.25
18 20.5
19 24.0
20 28.0
21 34.8
22 41.8
23 49.8
24 57.9
25 68.7

Millimeter(MM) to carat weight against different sizes of the stones ranges from 1.6 mm to 25 mm and for different shapes such as round, square, oval, emerald, pear, marquis. Carat is used for measuring gemstones and pearls. Gemstones with deep cut or very shallow cut will vary for these estimated carat weights.

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