Dax Calculated Column for Repeat Count

Hi,

ID          Amt                 CalculatedColumn

1           1000                           3

1           2000                           3

1           3000                           3

2           10                               2

2            20                              2

I want to creat a calculated column where it counts number of id's repeated and shows same value for all rows for that ID

(as showned in above table). Kindly let me know how to create calculatedColumn for this

Thank you