Attached you find a excel file where you can get exact figures of IOPS and MB/s of throughput for your Azure Virtual Machines.
It takes all limitations in consideration.
The maximum MB/s and IOPS per VM Model and Size.
MB/s and IOPS of each Premium disks
Number of disks
And the chosen block size for your disks.
Change yellow cells, and you will find the correct numbers in the green cells.