Hello !
If you don't use vROps, you can use a RVtool extract from the scope you are considering from you on-premise DC and use the VMware Cloud on AWS online sizing tool :
VMware Cloud on AWS Sizer and TCO
If you are already using vROps in your environements, you can use your collected data to acurately size your VMC target size.
See how here : Creating a Size and Cost Plan for VMware Cloud on AWS - VMware Cloud Community
