Calculate vCPU per Server

[Himanshusince19]

I have a dell server with 16 Physical Core. I am very much confused about the calculation how many VMs can be created in these 16 Physical Cores. What is the exact calculation by which we can identify the total number of VMs can be created.

[pcgeek2009]

There is a lot that goes into calculating the resources. For example, will all of the VM's be the same configuration. There is a book written by Frank Denneman for 6.5 that has been recommended on here a number of times. It is still available as a free download. I am not aware of a "free" calculator that does this type of prediction. I have owned things like Turbonomics in the past, where you could input a lot of information about environment and it would produce a report. You are not necessarily limited by the physical CPU and threads. This may help you in trying to analyze your environment. 

https://frankdenneman.nl/2017/11/07/free-vsphere-6-5-host-resources-deep-dive-ebook/

[irigoyen]

 answered already correctly.

I can just add following statement from vmware:

As a guideline, the following vCPU:pCPU ratios can be considered a good starting point for a design:

• 1:1 to 3:1 is not typically an issue
• With 3:1 to 5:1, you might begin to see performance degradation
• 6:1 or greater is often going to cause a significant problem for VM performance