Availability Table (90%-99.999% Uptime)
Availability (uptime) is calculated as a time a given service was unavailable over a specified period of time. For example to reach 99.9% availability over a period of a month, the maximum allowed downtime is 43.2 minutes.
The availability table below shows how much downtime is permitted to achieve a desired availability level.
| Availability level | Allowed unavailability window | |||||
|---|---|---|---|---|---|---|
| (uptime) | per year | per quarter | per month | per week | per day | per hour |
| 90% | 36.5 days | 9 days | 3 days | 16.8 hours | 2.4 hours | 6 minutes |
| 95% | 18.25 days | 4.5 days | 1.5 days | 8.4 hours | 1.2 hours | 3 minutes |
| 99% | 3.65 days | 21.6 hours | 7.2 hours | 1.68 hours | 14.4 minutes | 36 seconds |
| 99.5% | 1.83 days | 10.8 hours | 3.6 hours | 50.4 minutes | 7.20 minutes | 18 seconds |
| 99.9% | 8.76 hours | 2.16 hours | 43.2 minutes | 10.1 minutes | 1.44 minutes | 3.6 seconds |
| 99.95% | 4.38 hours | 1.08 hours | 21.6 minutes | 5.04 minutes | 43.2 seconds | 1.8 seconds |
| 99.99% | 52.6 minutes | 12.96 minutes | 4.32 minutes | 60.5 seconds | 8.64 seconds | 0.36 seconds |
| 99.999% | 5.26 minutes | 1.30 minutes | 25.9 seconds | 6.05 seconds | 0.87 seconds | 0.04 seconds |
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
Make your mark
Join the writer's program
Are you a developer and love writing and sharing your knowledge with the world? Join our guest writing program and get paid for writing amazing technical guides. We'll get them to the right readers that will appreciate them.
Write for us
Build on top of Better Stack
Write a script, app or project on top of Better Stack and share it with the world. Make a public repository and share it with us at our email.
community@betterstack.comor submit a pull request and help us build better products for everyone.
See the full list of amazing projects on github