SLA & Uptime calculator: How much downtime corresponds to 99.9 % uptime

Flexible SLA Calculator

Specify uptime requirement per weekday

SLA level: %
(enter SLA level and hit the <enter> key)

SLA level of 99.9 % uptime results in the following periods of acceptable downtime during the various reporting periods:

Allowed downtime by reporting period
Weekly	6m 29s
Monthly	28m 11s
Quarterly	1h 24m 32s
Yearly	5h 38m 6.6s

Direct link to the page with these results: uptime.is/complex?sla=99.9&wk=vtnrqes

Current Monitoring Periods

Current monitoring periods (hours per day)
Monday	21 hours/day
Tuesday	19 hours/day
Wednesday	13 hours/day
Thursday	17 hours/day
Friday	16 hours/day
Saturday	4 hours/day
Sunday	18 hours/day

For convenience, there are some quick links for a number of common monitoring periods:

Relaxed working hours (6 hours/day Monday–Friday)
Normal working hours (8 hours/day Monday–Friday)
Extended working hours (10 hours/day Monday–Friday)
Extreme working hours (12 hours/day Monday–Friday)
Founder's working hours (24/7)

Custom Monitoring Periods

Specify a number of hours the availability shall be measured on specific weekdays. 0 means that there will be no measuring on a given day (e.g. on Saturdays and Sundays), while 24 states a requirement of 24 hours of uptime on a given day.

Custom monitoring periods by weekday
Monday	hours/day
Tuesday	hours/day
Wednesday	hours/day
Thursday	hours/day
Friday	hours/day
Saturday	hours/day
Sunday	hours/day