Calculate MTTR, MTTF, MTBF, and availability from incident data or set targets to see allowed downtime budgets.
| Period | Two 9s (99%) | Three 9s (99.9%) | Four 9s (99.99%) | Five 9s (99.999%) |
|---|---|---|---|---|
| Per Year | 3d 15h 36m | 8h 45m 36s | 52m 33.6s | 5m 15.4s |
| Per Month | 7h 18m | 43m 48s | 4m 22.8s | 26.3s |
| Per Week | 1h 40m 48s | 10m 4.8s | 1m 0.5s | 6.0s |
| Per Day | 14m 24s | 1m 26.4s | 8.6s | 0.9s |
MTTR (Mean Time to Repair) - Average duration to restore service after a failure. Lower is better. Tracks your team's incident response speed.
MTTF (Mean Time to Failure) - Average uptime between failures. Higher is better. Reflects system stability and preventive maintenance quality.
MTBF (Mean Time Between Failures) - Full cycle time: MTTF + MTTR. Represents the average interval from one failure onset to the next.