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Network Uptime Calculator

Calculate network availability, allowed downtime, and MTBF/MTTR

Availability Target

Select a standard SLA tier or enter a custom value. Each additional 9 dramatically reduces allowed downtime.
%

Allowed Downtime

Per Year
Per Month
Per Week
Per Day

MTBF / MTTR Calculator

Average time the system runs before a failure occurs.
hours
Average time to restore the system after a failure.
hours

MTBF/MTTR Results

Calculated Availability%
Annual Downtime
Failures per Year
Availability Rating
How it works: Availability = MTBF / (MTBF + MTTR). Allowed downtime = (1 - availability) × time period. Five nines (99.999%) allows only 5.26 minutes/year downtime. Each additional nine reduces allowed downtime by 10x.