×
carat vs. color  length*  width*
  ×

(or examine a )
* size in mm (optional)

1ct Diamond (Round, 6.4×6.4mm, White) vs 2ct Diamond (Round, 8.5×8.5mm, White)


Quick summary: When looked from above (face-up position), 2ct Diamond (8.5×8.5mm, round cut) appears 76% larger than 1ct Diamond (6.4×6.4mm, round cut). See below how they compare side-by-side on a ring and finger.

1ct Diamond (round cut)
vs
 2ct Diamond (round cut)
white
 
white
6.4×6.4 mm 8.5×8.5 mm
actual size
Actual size of 1ct Diamond (round cut, 6.4×6.4mm, White color)   Actual size of 2ct Diamond (round cut, 8.5×8.5mm, White color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
White 1ct Diamond (round cut, 6.4×6.4mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 2ct Diamond (round cut, 8.5×8.5mm) on a right ring and finger
Your settings
Ring
 Gold
Skin tone
 Light
Ring diameter
 16.9 mm
Ring width
 3.0 mm
Finger length
 64 mm
Finger coverage
 38% vs 51%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 1ct Diamond Round (6.4×6.4mm, White) and 2ct Diamond Round (8.5×8.5mm, White) as they would appear on a ring and finger. Adjust the ring and finger size to get an idea of how these gemstones would look on your finger.

Where to buy?

For certified gemstones, high-end gemstone jewelry, and birthstone jewelry, see Blue Nile

Face-up Size

The face-up size depends on the shape of the gem, its weight and the proportions of the cut. Face-up area is a measure of the size of the gem when viewed from above (as set in a ring). It tells you how big the gem is at the girdle plane.


1 Ct Diamond (Round) 2 Ct Diamond (Round)
6.4×6.4 mm vs 8.5×8.5 mm
32.17 mm²   56.75 mm²
Face-up size outline for 2ct Diamond (8.5×8.5mm, round cut)
Face-up size outline for 1ct Diamond (6.4×6.4mm, round cut)
1ct Diamond Round (6.4×6.4mm)
2ct Diamond Round (8.5×8.5mm)
Difference: 76% (24.58 mm²)
2ct Diamond (Round, 8.5×8.5mm) has approx. 76% more face-up area than 1ct Diamond (Round, 6.4×6.4mm).


Popular comparisons: