Website uptime is the percentage of time that a website is up and available.
Example website uptime calculation:
Let’s say your website, example.com, was up and available all month, except for a 30 minute period where it was inaccessible. We would say example.com had 30 minutes of downtime.
To calculate your website uptime percentage for the month:
- 43,800 minutes in a month
- 30 minutes of downtime
- 30/43,800 = 0.0006849315
That’s 0.06% downtime for the month, which means that:
Example.com has a website uptime of 99.94%.
What is a good website uptime goal?
Many people consider 99.9% the minimum acceptable uptime. 99.99% uptime is a good goal to aim for–that requires less than 10 minutes of downtime per month.