How big is a 1.5 carat radiant cut diamond?
By HeyGema™ · Updated
In short
A 1.5 carat radiant cut diamond measures about 7.4 x 5.7 mm. It faces up 2% smaller than a round diamond of the same weight. On a size 6 finger it covers 35% of the width. For the same weight, a round diamond is 7.4 mm.
- 7.4 x 5.7 mm1.5 carat radiant
- 0.29 x 0.23 inthe same in inches
- -2%face-up size vs a round
- 35%of a size 6 finger's width
Carat to mm calculator
About 7.4 x 5.7 mm
An estimate for a well-cut stone. A deep or shallow cut faces up smaller or bigger.
1.5 carat radiant diamond size
A well-cut 1.5 carat radiant cut diamond measures about 7.4 x 5.7 mm (0.29 x 0.23 inches) at a length-to-width ratio of 1.30:1. It faces up 2% smaller than a round diamond of the same weight. It weighs 0.30 grams.
1.5 carat radiant size by length-to-width ratio
The same weight can be long and narrow or short and wide. These are 1.5 carat sizes at each ratio. A longer ratio runs the stone along the finger and makes it look slimmer. The face-up area stays almost the same.
- 1.00:1
- Length x width: 6.5 x 6.5 mm
- Width on the finger: 40% of a size 6 finger
- 1.15:1
- Length x width: 7.0 x 6.1 mm
- Width on the finger: 37% of a size 6 finger
- 1.30:1
- Length x width: 7.4 x 5.7 mm
- Width on the finger: 35% of a size 6 finger
- 1.40:1
- Length x width: 7.7 x 5.5 mm
- Width on the finger: 33% of a size 6 finger
1.5 carat radiant on a finger
- 4
- Finger width: 14.9 mm
- Radiant covers: 38%
- 5
- Finger width: 15.7 mm
- Radiant covers: 36%
- 6
- Finger width: 16.5 mm
- Radiant covers: 35%
- 7
- Finger width: 17.3 mm
- Radiant covers: 33%
- 8
- Finger width: 18.1 mm
- Radiant covers: 32%
- 9
- Finger width: 18.9 mm
- Radiant covers: 30%
Radiant sizes near 1.5 carat
- 1 carat
- Length x width: 6.5 x 5.0 mm
- Round of the same weight: 6.5 mm
- 1.25 carat
- Length x width: 7.0 x 5.4 mm
- Round of the same weight: 6.9 mm
- 1.5 (this page)
- Length x width: 7.4 x 5.7 mm
- Round of the same weight: 7.4 mm
- 1.75 carat
- Length x width: 7.8 x 6.0 mm
- Round of the same weight: 7.8 mm
- 2 carat
- Length x width: 8.2 x 6.3 mm
- Round of the same weight: 8.1 mm
1.5 carat in other shapes
Every row is a well-cut diamond of 1.5 carat. The last column is the face-up size against the radiant.
- Round
- Length x width: 7.4 mm
- Against radiant: +2%
- Oval
- Length x width: 9.2 x 6.3 mm
- Against radiant: +8%
- Cushion
- Length x width: 6.4 x 6.4 mm
- Against radiant: -12%
- Princess
- Length x width: 6.3 x 6.3 mm
- Against radiant: -6%
- Emerald cut
- Length x width: 8.0 x 5.7 mm
- Against radiant: +6%
- Asscher
- Length x width: 6.3 x 6.3 mm
- Against radiant: -13%
- Pear
- Length x width: 9.7 x 6.3 mm
- Against radiant: same
- Marquise
- Length x width: 11.9 x 6.0 mm
- Against radiant: +19%
- Heart
- Length x width: 7.4 x 7.4 mm
- Against radiant: -15%
- Trillion
- Length x width: 8.0 x 8.0 mm
- Against radiant: -11%
- Baguette
- Length x width: 9.2 x 4.6 mm
- Against radiant: same