'Website Monitoring' Category

• 99.999 or Five Nines Uptime

  99.999% Uptime is difficult to achieve and may not be worth the cost.
  From the table below, your website would be unreachable for only 5 minutes a year if you are to be called 5 nines or 99.999% available.

  Uptime (%)
  Downtime

  90%
  876 hours (36.5 days)

  95%
  438 hours (18.25 days)

  99%
  87.6 hours (3.65 days)

  99.9%
  8.76 hours

  99.99%
  52.56 minutes

  99.999%
  5.256 minutes

  99.9999%
  31.536 seconds

  December 14th, 2005