How vCPU's calculated from CPU?

vCPU is calculated by the number of processing threads of a chipset per core and multiplying the number of sockets present in the server/system.

A thread is a path of execution within a process.

Simply put this is the formula for calculating the vCPUs: -

(Core x Thread) x No. of Physical CPU (Sockets) = Number of vCPU


Let us assume, A server with Single E3-1225 v3 processor contains 4 Core and 4 Thread, now the vCPU can be calculated using the above-mentioned formula

(4 Core x 4 Thread) x 1 Physical CPU (Sockets) = 16 vCPU