A website is housed on what is called a website host or a computer in a data center (rather than a computer under your brother-in-laws bed, ew!) that serves the website to the internet. A site that is “down” is as good as not having a site at all – no visitors, no traffic, no revenue, nothing – zilch. Because of this, a very high uptime guarantee percentage should be your top, or at the very least, major criterion when choosing a host.
99.9% uptime is currently the industry standard for most hosting companies that service the average Joe/Jane on the street. So what does that actually mean in terms of actual hours and minutes? It’s a rather simple calculation really.
The total number of minutes in a month x (100-uptime%)/100
= 30days x 24hours x 60min x (100-99.9)/100
= 43200 x (0.1)/100
= 43.2 minutes (max downtime).