How many carats is a 4 mm moissanite?
By HeyGema™ · Updated
In short
A 4 mm round moissanite is labeled 0.24 carat, its diamond equivalent weight (DEW). On a scale it weighs about 0.22 carat, because moissanite is lighter than diamond.
- 0.24 ctdiamond equivalent weight
- 0.22 cttrue weight
- 0.16 in4 mm in inches
Carat to mm calculator
About 0.22 carat
An estimate for a well-cut stone. A deep or shallow cut faces up smaller or bigger.
4 mm moissanite by shape
For shapes that are longer than they are wide, the long side is 4 mm and the width follows the usual ratio.
- Round
- Size: 4 mm
- DEW: 0.24 ct
- True weight: 0.22 ct
- Oval
- Size: 4 mm x 2.76 mm
- DEW: 0.13 ct
- True weight: 0.12 ct
- Cushion
- Size: 4 mm x 4.0 mm
- DEW: 0.36 ct
- True weight: 0.33 ct
- Princess
- Size: 4 mm x 4.0 mm
- DEW: 0.38 ct
- True weight: 0.35 ct
- Emerald cut
- Size: 4 mm x 2.86 mm
- DEW: 0.19 ct
- True weight: 0.17 ct
- Asscher
- Size: 4 mm x 4.0 mm
- DEW: 0.38 ct
- True weight: 0.35 ct
- Radiant
- Size: 4 mm x 3.1 mm
- DEW: 0.23 ct
- True weight: 0.21 ct
- Pear
- Size: 4 mm x 2.58 mm
- DEW: 0.1 ct
- True weight: 0.090 ct
- Marquise
- Size: 4 mm x 2.00 mm
- DEW: 0.060 ct
- True weight: 0.050 ct
- Heart
- Size: 4 mm x 4.0 mm
- DEW: 0.23 ct
- True weight: 0.21 ct
- Trillion
- Size: 4 mm x 4.0 mm
- DEW: 0.19 ct
- True weight: 0.17 ct
- Baguette
- Size: 4 mm x 2.00 mm
- DEW: 0.13 ct
- True weight: 0.12 ct
Nearby moissanite sizes
- 4 mm (this page)
- DEW: 0.24 ct
- True weight: 0.22 ct
- 5 mm
- DEW: 0.47 ct
- True weight: 0.43 ct
Questions
A round 4 mm moissanite is 0.24 carat DEW (the weight of a diamond that size) and about 0.22 carat on a scale.
A 4 mm moissanite is the same width as a 4 mm diamond, which weighs 0.24 carat. The moissanite weighs less.
4 mm is 0.16 inches.