Azure Site Recovery Capacity Planner http://aka.ms/asr-capacity-planner-excel
Azure Backup – Storage capacity planner for IaaS virtual machine backup https://gallery.technet.microsoft.com/Azure-Backup-Storage-a46d7e33
Capacity planner for Azure Backup https://gallery.technet.microsoft.com/Capacity-planner-for-Azure-de6f1457
Azure DocumentDB – Estimate Request Units and Data Storage https://www.documentdb.com/capacityplanner