MM Size | Carat Weight |
|---|---|
0.8 mm. | 0.0025 ct. |
1 mm. | 0.005 ct. |
1.15 mm. | 0.0067 ct. |
1.12 mm. | 0.0075 ct. |
1.25 mm. | 0.01 ct. |
1.3 mm. | 0.01 ct. |
1.5 mm. | 0.015 ct. |
1.75 mm. | 0.02 ct. |
1.8 mm. | 0.025 ct. |
2 mm. | 0.03 ct. |
2.25 mm. | 0.04 ct. |
2.5 mm. | 0.06 ct. |
2.75 mm. | 0.08 ct. |
3 mm. | 0.11 ct. |
3.25 mm. | 0.14 ct. |
3.5 mm. | 0.17 ct. |
3.75 mm. | 0.21 ct. |
4 mm. | 0.25 ct. |
4.25 mm. | 0.28 ct. |
4.5 mm. | 0.36 ct. |
4.75 mm. | 0.44 ct. |
5.0 mm. | 0.50 ct. |
5.25 mm. | 0.56 ct. |
5.5 mm. | 0.66 ct. |
5.75 mm. | 0.75 ct. |
6 mm. | 0.84 ct. |
6.25 mm. | 0.93 ct. |
6.5 mm. | 1.00 ct. |
6.8 mm. | 1.25 ct. |
MM Size | Carat Weight |
|---|---|
7 mm. | 1.30 ct. |
7.3 mm. | 1.50 ct. |
7.5 mm. | 1.67 ct. |
7.75 mm. | 1.75 ct. |
8 mm. | 2.00 ct. |
8.25 mm. | 2.11 ct. |
8.5 mm. | 2.43 ct. |
8.7 mm. | 2.50 ct. |
9 mm. | 2.75 ct. |
9.1 mm. | 3.00 ct. |
9.5 mm. | 3.35 ct. |
9.75 mm. | 3.61 ct. |
10 mm. | 3.87 ct. |
10.25 mm. | 4.16 ct. |
10.5 mm. | 4.41 ct. |
10.75 mm. | 4.57 ct. |
11 mm. | 4.91 ct. |
11.25 mm. | 5.49 ct. |
11.5 mm. | 5.85 ct. |
12 mm. | 6.84 ct. |
12.25 mm. | 7.26 ct. |
12.5 mm. | 7.36 ct. |
12.75 mm. | 7.52 ct. |
13 mm. | 8.51 ct. |
13.5 mm. | 9.53 ct. |
14 mm. | 10.49 ct. |
15 mm. | 12.89 ct. |
16 mm. | 16.06 ct. |
Understanding mm to carat and how diamond size in millimeters relates to carat weight is essential when choosing a diamond. Because shape and cut affect how a diamond appears, using an accurate mm to carat conversion chart helps you confidently compare sizes and weights for any diamond
MM Size | Carat Weight |
|---|---|
4.2 mm. | 0.40 ct. |
4.9 mm. | 0.50 ct. |
5.25 mm. | 0.75 ct. |
5.5 mm. | 1.00 ct. |
6 mm. | 1.25 ct. |
6.5 mm. | 1.50 ct. |
7 mm. | 2.00 ct. |
7.5 mm. | 2.50 ct. |
MM Size | Carat Weight |
|---|---|
8 mm. | 3.00 ct. |
8.5 mm. | 3.50 ct. |
9 mm. | 4.12 ct. |
9.5 mm. | 5.09 ct. |
10 mm. | 5.62 ct. |
11 mm. | 7.44 ct. |
12 mm. | 9.52 ct. |
13 mm. | 12.66 ct. |
MM Size | Carat Weight |
|---|---|
3×2 mm. | 0.13 ct. |
4×2.5 mm. | 0.18 ct. |
4×3 mm. | 0.21 ct. |
5×3 mm. | 0.25 ct. |
5×4 mm. | 0.35 ct. |
6×4 mm. | 0.50 ct. |
6.5×4.5 mm. | 0.60 ct. |
7×5 mm. | 0.75 ct. |
7.5×5.5 mm. | 0.85 ct. |
7.7×5.7 mm. | 1.00 ct. |
8×6 mm. | 1.25 ct. |
8.5×6.5 mm. | 1.50 ct. |
10×6 mm. | 1.71 ct. |
8.7×6.7 mm. | 1.80 ct. |
9×7 mm. | 2.00 ct. |
10×8 mm. | 2.50 ct. |
11×7.50 mm. | 2.61 ct. |
13×8 mm. | 2.98 ct. |
11×8 mm. | 3.00 ct. |
MM Size | Carat Weight |
|---|---|
12×8 mm. | 3.00 ct. |
12×7 mm. | 3.12 ct. |
12×9 mm. | 3.44 ct. |
14×8 mm. | 3.47 ct. |
13×9 mm. | 4.11 ct. |
14×9 mm. | 4.25 ct. |
15×9 mm. | 5.06 ct. |
14×10 mm. | 5.41 ct. |
13×11 mm. | 5.65 ct. |
15×10 mm. | 5.75 ct. |
16×9 mm. | 5.86 ct. |
16×10 mm. | 6.27 ct. |
17×10 mm. | 6.46 ct. |
15×11 mm. | 7.36 ct. |
18×11 mm. | 8.14 ct. |
16×12 mm. | 8.99 ct. |
18×12 mm. | 9.35 ct. |
18×13 mm. | 10.21 ct. |
MM Size | Carat Weight |
|---|---|
3×2 mm. | 0.10 ct. |
3.5×2 mm. | 0.12 ct. |
4×2 mm. | 0.15 ct. |
4×3 mm. | 0.20 ct. |
5×3 mm. | 0.29 ct. |
5.5×3.5 mm. | 0.46 ct. |
6×4 mm. | 0.50 ct. |
6.5×4.5 mm. | 0.75 ct. |
6.7×4.5 mm. | 0.88 ct. |
7×5 mm. | 1.00 ct. |
7.3×5.3 mm. | 1.25 ct. |
7.5×5.5 mm. | 1.50 ct. |
8×6 mm. | 1.75 ct. |
8.5×6.5 mm. | 2.00 ct. |
MM Size | Carat Weight |
|---|---|
9×7 mm. | 2.50 ct. |
10×7.5 mm. | 3.00 ct. |
9.5×7.5 mm. | 3.21 ct. |
10×8 mm. | 3.79 ct. |
11×9 mm. | 5.21 ct. |
12×8 mm. | 5.34 ct. |
12×10 mm. | 6.00 ct. |
14×8 mm. | 6.25 ct. |
13×9 mm. | 6.38 ct. |
14×10 mm. | 8.48 ct. |
13×11 mm. | 9.13 ct. |
14×12 mm. | 11.26 ct. |
16×12 mm. | 14.22 ct. |
MM Size | Carat Weight |
|---|---|
4.5×3.5 mm. | 0.21 ct. |
5×3 mm. | 0.21 ct. |
5.5×3.5 mm. | 0.33 ct. |
5×4 mm. | 0.35 ct. |
6×4 mm. | 0.50 ct. |
6×5 mm. | 0.61 ct. |
6.5×4.5 mm. | 0.65 ct. |
7×5 mm. | 0.75 ct. |
7.7×5.7 mm. | 1.00 ct. |
8×6 mm. | 1.25 ct. |
9×6 mm. | 1.41 ct. |
8.5×6.5 mm. | 1.50 ct. |
9×7 mm. | 2.00 ct. |
MM Size | Carat Weight |
|---|---|
10×8 mm. | 2.50 ct. |
10.5×8.5 mm. | 2.88 ct. |
12×8 mm. | 3.00 ct. |
11×9 mm. | 3.85 ct. |
12×10 mm. | 5.05 ct. |
14×10 mm. | 5.81 ct. |
13×11 mm. | 6.05 ct. |
14×12 mm. | 8.21 ct. |
15×12 mm. | 8.76 ct. |
16×12 mm. | 9.32 ct. |
16×14 mm. | 11.88 ct. |
18×13 mm. | 12.86 ct. |
20×15 mm. | 14.96 ct. |
MM Size | Carat Weight |
|---|---|
1.5 mm. | 0.015 ct. |
1.75 mm. | 0.03 ct. |
2 mm. | 0.06 ct. |
2.25 mm. | 0.08 ct. |
2.5 mm. | 0.10 ct. |
2.75 mm. | 0.13 ct. |
3 mm. | 0.18 ct. |
3.25 mm. | 0.26 ct. |
3.5 mm. | 0.29 ct. |
3.75 mm. | 0.31 ct. |
4 mm. | 0.39 ct. |
4.25 mm. | 0.44 ct. |
4.5 mm. | 0.50 ct. |
4.75 mm. | 0.64 ct. |
5 mm. | 0.75 ct. |
5.25 mm. | 0.90 ct. |
5.5 mm. | 1.00 ct. |
5.75 mm. | 1.11 ct. |
6 mm. | 1.25 ct. |
6.25 mm. | 1.39 ct. |
MM Size | Carat Weight |
|---|---|
6.5 mm. | 1.50 ct. |
6.75 mm. | 1.75 ct. |
7 mm. | 2.00 ct. |
7.25 mm. | 2.01 ct. |
7.5 mm. | 2.50 ct. |
7.75 mm. | 2.74 ct. |
8 mm. | 3.00 ct. |
8.25 mm. | 3.24 ct. |
8.5 mm. | 3.67 ct. |
8.75 mm. | 4.10 ct. |
9 mm. | 4.12 ct. |
9.5 mm. | 5.09 ct. |
9.75 mm. | 5.36 ct. |
10 mm. | 5.62 ct. |
10.25 mm. | 5.76 ct. |
10.5 mm. | 5.99 ct. |
11 mm. | 7.44 ct. |
11.5 mm. | 9.44 ct. |
12 mm. | 9.52 ct. |
MM Size | Carat Weight |
|---|---|
4 mm. | 0.39 ct. |
4.5 mm. | 0.50 ct. |
5 mm. | 0.75 ct. |
5.5 mm. | 1.00 ct. |
6 mm. | 1.25 ct. |
6.5 mm. | 1.50 ct. |
7 mm. | 2.00 ct. |
7.5 mm. | 2.50 ct. |
MM Size | Carat Weight |
|---|---|
8 mm. | 3.00 ct. |
8.5 mm. | 3.50 ct. |
9 mm. | 4.12 ct. |
9.5 mm. | 5.09 ct. |
10 mm. | 5.62 ct. |
11 mm. | 7.44 ct. |
12 mm. | 9.52 ct. |
13 mm. | 12.66 ct. |
MM Size | Carat Weight |
|---|---|
5×3 mm. | 0.31 ct. |
4.5×3.5 mm. | 0.34 ct. |
6×3 mm. | 0.41 ct. |
6×4 mm. | 0.50 ct. |
6.5×4.5 mm. | 0.75 ct. |
7×5 mm. | 1.00 ct. |
7.3×5.5 mm. | 1.25 ct. |
7.5×5.8 mm. | 1.50 ct. |
8×6 mm. | 2.00 ct. |
8.5×6.5 mm. | 2.25 ct. |
9×7 mm. | 2.50 ct. |
9.5×7.5 mm. | 3.00 ct. |
10×7 mm. | 3.31 ct. |
MM Size | Carat Weight |
|---|---|
10×8 mm. | 3.50 ct. |
11×9 mm. | 5.05 ct. |
12×9 mm. | 6.06 ct. |
11.5×10 mm. | 6.45 ct. |
13×9 mm. | 6.54 ct. |
12×10 mm. | 6.79 ct. |
14×10 mm. | 8.47 ct. |
13×11 mm. | 9.33 ct. |
13.5×11.5 mm. | 10.19 ct. |
15×11 mm. | 11.48 ct. |
14×12 mm. | 12.14 ct. |
16×12 mm. | 14.22 ct. |
MM Size | Carat Weight |
|---|---|
3.5 mm. | 0.18 ct. |
4 mm. | 0.25 ct. |
4.25 mm. | 0.28 ct. |
4.5 mm. | 0.34 ct. |
4.75 mm. | 0.38 ct. |
5 mm. | 0.50 ct. |
5.5 mm. | 0.61 ct. |
6 mm. | 0.75 ct. |
6.25 mm. | 0.83 ct. |
6.5 mm. | 1.00 ct. |
7 mm. | 1.25 ct. |
7.5 mm. | 1.50 ct. |
MM Size | Carat Weight |
|---|---|
8 mm. | 2.00 ct. |
8.5 mm. | 2.50 ct. |
9 mm. | 3.00 ct. |
10 mm. | 3.50 ct. |
11 mm. | 4.41 ct. |
12 mm. | 5.66 ct. |
13 mm. | 7.88 ct. |
14 mm. | 9.38 ct. |
15 mm. | 10.79 ct. |
16 mm. | 13.27 ct. |
18 mm. | 15.33 ct.
|
MM Size | Carat Weight |
|---|---|
3×1.5 mm. | 0.025 ct. |
3.5×1.75 mm. | 0.065 ct. |
3.5×2 mm. | 0.07 ct. |
4×2 mm. | 0.10 ct. |
3.75×1.75 mm. | 0.11 ct. |
4.25×2.25 mm. | 0.12 ct. |
5×2.5 mm. | 0.14 ct. |
5.5×2.75 mm. | 0.16 ct. |
5.5×3 mm. | 0.18 ct. |
5×3 mm. | 0.20 ct. |
6.5×3 mm. | 0.23 ct. |
6×3 mm. | 0.25 ct. |
7×3 mm. | 0.30 ct. |
7.5×3.5 mm. | 0.33 ct. |
7×4 mm. | 0.34 ct. |
8×4 mm. | 0.50 ct. |
8.75×4.25 mm. | 0.70 ct. |
9×4.5 mm. | 0.75 ct. |
MM Size | Carat Weight |
|---|---|
9.5×4.7 mm. | 0.85 ct. |
10×5 mm. | 1.00 ct. |
11×5.5 mm. | 1.25 ct. |
11.5×6 mm. | 1.33 ct. |
12×6 mm. | 1.50 ct. |
13×6.5 mm. | 2.00 ct. |
14×7 mm. | 2.50 ct. |
15×7 mm. | 3.00 ct. |
14×8 mm. | 3.00 ct. |
15×7.5 mm. | 3.25 ct. |
15×8 mm. | 3.44 ct. |
16×8 mm. | 3.86 ct. |
16.5×8.25 mm. | 4.00 ct. |
17×8.5 mm. | 4.88 ct. |
17.5×10 mm. | 5.50 ct. |
20×8 mm. | 7.08 ct. |
20×10 mm. | 7.94 ct. |
20×11 mm. | 9.50 ct. |
Starting January 1, 2026, importing diamonds into the EU requires more than a grading report. This guide explains what buyers must check to prove origin and avoid delays.
The diamond industry is experiencing a significant shift as lab-grown diamond prices are crashing due to oversupply and increased production in China and India, impacting consumer confidence.
Most people don’t realize this, but an engagement ring can lose 30% to 70% of its value the moment it leaves the store.
The Golconda Blue, a 23.24 ct Fancy Vivid Blue diamond of legendary Golconda origin, is about to make history at Christie’s 2025 Geneva auction. Discover its rarity, heritage, and the timeless allure that places it among the world’s greatest gems.
When talking about luxury, refinement, and timeless style, it is impossible not to mention the name “Cartier.” The French luxury house, which began its journey in Paris in 1847, has established itself as one of the leading brands in the world of jewelry and watches. Cartier’s influence on jewelry trends…
The campaign Forever Present breathes new life into the timeless and iconic tagline “A Diamond Is Forever,” underscoring the perpetual diamond dream that signifies everlasting love and dedication. De Beers Group established in 1888, has a rich legacy in the diamond industry…
Share & Tell