Uptime SLAs
Vendors publish services with a guaranteed or defined uptime SLA. This chart translates the uptime % into the actual seconds, minutes or hours of permitted downtime.
This chart is provided as a reference only. Please check with the vendor for the definition of the SLA, the metrics used to calculate the uptime and the exclusions.
Total Seconds in a Year = 60 x 60 x 24 x 365 = 31536000
| Uptime % | Downtime (Seconds) |
Downtime (Minutes) |
Notes |
| 99.9 | 31536 | 525.6 | 9 hours/year |
| 99.91 | 28382.4 | 473.04 | 8 hours/year |
| 99.92 | 25228.8 | 420.48 | 7 hours/year |
| 99.93 | 22075.2 | 367.92 | 6 hours/year |
| 99.94 | 18921.6 | 315.36 | 5 hours/year |
| 99.95 | 15768 | 262.8 | 4.5 hours/year |
| 99.96 | 12614.4 | 210.24 | 3.5 hours/year |
| 99.97 | 9460.8 | 157.68 | 2.5 hours/year |
| 99.98 | 6307.2 | 105.12 | Almost 2 hours/year |
| 99.99 | 3153.6 | 52.56 | Less than an hour/year |
| 99.999 | 315.36 | 5.256 | 5 minutes/year |
| 99.9999 | 31.536 | 0.5256 | Less than a minute/year |
| 99.99999 | 3.1536 | 0.05256 | Always up |