99% = 7h 18m 17s
99.5% = 3h 39m 8s
99.95% = 21m 54s
99.9% = 43m 49s
99.99% = 4m 22s
99.999% = 26s
In Azure, there are different SLAs for Virtual Machine.
99.9% — This is the SLA for a single instance Virtual Machine. Azure guarantees 99.9% connectivity for a single VM for all operating system disk and data disk.
99.95% — Azure guarantees connectivity of at least 99.95% for all virtual machines that have two or more instances deployed in the same Availability Set.
99.99% — Azure guarantees connectivity of at least 99.99% for all virtual machines that have two or more instances deployed across two or more Availability Zones in the same Azure Region.