Here's how it works: Determine the total time you want to measure uptime for. This could be a month, a year, or any other period. Add up the total downtime during that period. This is the time the system, website or server was not working. Subtract the downtime from the total time to get the uptime. Divide the uptime by the total time.

Basic uptime calculation is pretty simple to understand. You take the number of seconds that a server was down in a specific time frame and divide it by the total number of seconds you were monitoring the server during that same time frame. The result you get is the downtime percentage.

Calculating uptime is easier than you think! The basic formula of uptime calculation is: Uptime (%) = (Total Time - Downtime) / Total Time x 100 This formula helps you determine the percentage of time your service is available and operational compared to the total time it should be available.

We calculate uptime using this formula: Uptime / (Uptime + Downtime) Uptime = 54 minutes. Downtime = 1 minute. Maintenance time = 5 minutes. Uptime percentage = 54 / (54 + 1) or 98.182% So time spent in maintenance doesn't count for you and it doesn't count against you, it just doesn't count.