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Uptime / SLA Calculator
OpsTurn an SLA percentage into allowed downtime per day, week, month and year — the 'nines' made concrete.
Allowed downtime at 99.9%
Per day1m 26s
Per week10m 4s
Per month (30d)43m 11s
Per quarter (90d)2h 9m
Per year (365d)8h 45m
“Three nines” (99.9%) allows ~8h 45m of downtime a year; “five nines” (99.999%) only ~5m 15s. Each extra nine is a 10× cut in your error budget.