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Interactive Tool
Diamond size comparison
Carat weight alone doesn't tell you how big a diamond will look. Pick two shapes and carat weights below to see them sized to scale on a ring and finger, calibrated to your screen.
Stone A
1 ct
0.25 ct3 ct
Stone B
1.5 ct
0.25 ct3 ct
Ring size6½
Band width2.2 mm
Metal
Overall, 1.5ct Round is 30% larger than 1ct Round when looked at from above.
Actual size
1ct Round
Actual size
1.5ct Round
| Attribute | 1ct Round | 1.5ct Round |
|---|---|---|
| Shape | Round | Round |
| Weight | 1 ct | 1.5 ct |
| Measurements | 6.5×6.5×3.9 mm | 7.4×7.4×4.4 mm |
| Total depth % | 60% | 59.5% |
| Length / width ratio | 1 | 1 |
| Face-up area | 33.18 mm² | 43.01 mm² |
| Face-up area per carat | 33.18 mm²/ct | 28.67 mm²/ct |
| Approx. volume | 86.28 mm³ | 126.16 mm³ |
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