// how much downtime is

99% uptime = 3.7 days down per year.

That's 2.0 nines. Allowed downtime at 99% availability:

per year3.7 days
per month7.3 h
per week1.7 h
per day14.4 min

The neighborhood

what one more nine buys you
90%36.5 days/yr
99% ← you are here3.7 days/yr
99.5%43.8 h/yr
99.9%8.8 h/yr
99.95%4.4 h/yr
99.99%52.6 min/yr
99.995%26.3 min/yr
99.999%5.3 min/yr

Azure services live at specific rungs of this ladder — see the SLA dataset, or compute the composite for your whole environment from one Resource Graph query.

ⓘ Designed availability, not a guarantee.