How much uptime did you actually achieve?
Enter your downtime for a period and get your real uptime percentage and equivalent SLA tier.
Want to track your actual uptime automatically? Monitoring tools can continuously check your services and alert you the moment something goes down.
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How this is calculated
Uptime % = (1 − downtime ÷ total period length) × 100. For example, 47 minutes of downtime in a 30-day month (43,200 minutes) gives 99.891% uptime — just under the 99.9% SLA tier.
Frequently asked questions
What period should I measure downtime over?
Match whatever period your SLA is measured against — usually monthly, but some contracts use rolling 30-day windows or annual periods instead.
Does planned maintenance count as downtime?
Depends on your specific SLA's definition — many SLAs explicitly exclude scheduled maintenance windows from the downtime calculation. Check your contract's exact wording.