AU | US |
A | 1/2 |
A 1/2 | 3/4 |
B | 1 |
B 1/2 | 1 1/4 |
C | 1 1/2 |
C 1/2 | 1 3/4 |
D | 2 |
D 1/2 | 2 1/4 |
E | 2 1/2 |
E 1/2 | 2 3/4 |
F | 3 |
F 1/2 | 3 1/8 |
F 3/4 | 3 1/4 |
G | 3 3/8 |
G 1/4 | 3 1/2 |
G 1/2 | 3 5/8 |
H | 3 3/4 |
H 1/2 | 4 |
I | 4 1/4 |
I 1/2 | 4 1/2 |
J | 4 5/8 |
J 1/4 | 4 3/4 |
J 1/2 | 5 |
K | 5 1/8 |
K 1/4 | 5 1/4 |
K 1/2 | 5 3/8 |
L | 5 1/2 |
L 1/4 | 5 3/4 |
L 1/2 | 5 7/8 |
M | 6 |
M 1/2 | 6 1/4 |
N | 6 1/2 |
N 1/2 | 6 3/4 |
O | 7 |
O 1/2 | 7 1/4 |
P | 7 1/2 |
P 1/2 | 7 3/4 |
Q | 8 |
Q 1/2 | 8 1/4 |
Q 3/4 | 8 1/2 |
R | 8 5/8 |
R 1/4 | 8 3/4 |
R 1/2 | 8 7/8 |
R 3/4 | 9 |
S | 9 1/8 |
S 1/4 | 9 1/4 |
S 1/2 | 9 3/8 |
S 3/4 | 9 1/2 |
T | 9 5/8 |
T 1/4 | 9 3/4 |
T 1/2 | 10 |
U | 10 1/4 |
U 1/2 | 10 1/2 |
V | 10 5/8 |
V 1/4 | 10 3/4 |
V 1/2 | 11 |
W | 11 1/8 |
W 1/4 | 11 1/4 |
W 1/2 | 11 3/8 |
W 3/4 | 11 1/2 |
X | 11 5/8 |
X 1/4 | 11 3/4 |
X 1/2 | 11 7/8 |
Y | 12 |
Y 1/2 | 12 1/4 |
Z | 12 1/2 |
Z +1/2 | 12 3/4 |
Z+1 | 13 |
Z+1.5 | 13 1/2 |
Fraction | Carat weight |
9/10 | 0.90 – 0.95 |
7/8 | 0.84 – 0.89 |
3/4 | 0.70 – 0.83 |
5/8 | 0.57 – 0.69 |
1/2 | 0.47 – 0.56 |
3/8 | 0.38 – 0.46 |
1/3 | 0.30 – 0.37 |
1/4 | 0.23 – 0.29 |
1/5 | 0.18 – 0.22 |
1/6 | 0.15 – 0.17 |
1/8 | 0.12 – 0.14 |
1/10 | 0.09 – 0.11 |