Uptime SLA & “Nines”

Pick an availability target to see exactly how much downtime it allows per day, month, and year — and what it means for your scheduled jobs.

UptimeNameDowntime / monthDowntime / year
90%One Nine3 day 1 hr 2 min36 day 12 hr 35 min
99%Two Nines7 hr 18 min 18 sec3 day 15 hr 39 min
99.5%3 hr 39 min 9 sec1 day 19 hr 49 min
99.9%Three Nines43 min 50 sec8 hr 45 min 58 sec
99.95%21 min 55 sec4 hr 22 min 59 sec
99.99%Four Nines4 min 23 sec52 min 36 sec
99.999%Five Nines26 sec5 min 16 sec
99.9999%Six Nines3 sec32 sec

Need to calculate a custom percentage? Use the interactive uptime calculator →

Uptime SLA Calculator — Nines & Downtime Tables | CronJobPro