Half-Arabian registration numbers begin with a number and letter combination, such as “1A” or “2A”. These combinations designate the degree of Arabian blood present. Please see the following chart for additional information:
1A=1/2
2A=3/4
3A=7/8
4A=15/16
5A=31/32
6A=63/64
7A=127/128
8A=255/256
9A=511/512
If you are looking at a horse registered with the Canadian Partbred Arabian Registry (CPAR) the following designations will apply:
1A= < 62.5%
2A= > 62.5% and < 81.25%
3A= > 81.25% and < 90.63%
4A= > 90.63% and < 95.31%
5A= > 95.31% and < 100%
