Uptime & SLA Calculator
Enter an uptime percentage to see exactly how much downtime is allowed per year, month, week, day, and hour.
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Downtime per Year
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Downtime per Month
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Downtime per Week
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Downtime per Day
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Downtime per Hour
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Common SLA Uptime Reference Table
Quick benchmark overview of standard reliability tiers used across cloud providers and SaaS applications.
| Uptime % | Downtime per Day | Downtime per Week | Downtime per Month | Downtime per Year |
|---|---|---|---|---|
| 90% ("One Nine") | 2.4 hours | 16.8 hours | 72.0 hours | 36.5 days |
| 95% | 1.2 hours | 8.4 hours | 36.0 hours | 18.25 days |
| 99% ("Two Nines") | 14.4 minutes | 1.68 hours | 7.3 hours | 3.65 days |
| 99.9% ("Three Nines") | 1.44 minutes | 10.1 minutes | 43.8 minutes | 8.76 hours |
| 99.99% ("Four Nines") | 8.64 seconds | 1.01 minutes | 4.38 minutes | 52.6 minutes |
| 99.999% ("Five Nines") | 864 milliseconds | 6.05 seconds | 26.3 seconds | 5.26 minutes |