Calculate Mean Time to Repair from total repair time and number of repairs. Measure and improve your incident resolution speed.
Mean Time to Repair (MTTR) measures the average time required to restore a system to operational status after a failure. It is one of the most important reliability and incident response metrics, directly impacting service availability and user experience.
This calculator computes MTTR from total repair/recovery time and the number of repair events. A lower MTTR indicates faster incident resolution, which contributes to higher overall availability. Teams use MTTR to benchmark their incident response capabilities, identify process bottlenecks, and track improvement over time.
By calculating this metric accurately, DevOps and engineering professionals gain actionable insights that drive system reliability, scalability, and operational excellence across environments. Understanding this metric in precise terms allows technology leaders to make evidence-based decisions about scaling, architecture, and infrastructure investment priorities for their organizations.
By calculating this metric accurately, DevOps and engineering professionals gain actionable insights that drive system reliability, scalability, and operational excellence across environments.
MTTR directly determines how long users experience outages. By tracking and reducing MTTR, teams can significantly improve availability even without reducing failure frequency. This calculator provides instant MTTR computation to benchmark and improve your incident response process. This quantitative approach replaces reactive troubleshooting with proactive monitoring, enabling engineering teams to maintain service level objectives and minimize unplanned system downtime.
MTTR = Total Repair Time / Number of Repairs. For 450 minutes across 6 incidents: MTTR = 75 minutes.
Result: 75 minutes MTTR
With 450 total minutes spent on 6 repair events, the MTTR is 75 minutes (1.25 hours). This means on average, the team takes 1 hour and 15 minutes to restore service after a failure is detected.
MTTR is one of the four key DORA metrics that distinguish elite engineering teams. It measures how quickly your team can respond to and resolve production incidents, directly impacting user experience and business outcomes.
Break down MTTR into its phases: detection (time from failure to alert), triage (time to assign and begin investigation), diagnosis (time to identify root cause), remediation (time to implement the fix), and verification (time to confirm restoration). Each phase offers optimization opportunities.
Improve detection with comprehensive monitoring and alerting. Speed triage with clear escalation policies. Accelerate diagnosis with distributed tracing and structured logging. Automate remediation for known failure patterns. Streamline verification with automated health checks.
Track MTTR as a rolling average over 30, 60, and 90 days. Compare across services, teams, and incident severity levels. Use trend data to justify investments in observability, automation, and training.
MTTR typically includes detection time, diagnosis time, repair/fix time, and verification time. Some definitions only include the actual repair phase. Clarify which phases are included in your organization's MTTR definition.
DORA research classifies elite performers as having MTTR under 1 hour. High performers restore service within a day. The target depends on service criticality — payment systems need sub-minute recovery while batch processing can tolerate hours.
Invest in observability (logs, metrics, traces), create detailed runbooks, implement automated remediation for known failure modes, practice incident response, and ensure engineers have appropriate access and tooling. Keeping detailed records of these calculations will streamline future planning and make it easier to track changes over time.
They are often used interchangeably, but some frameworks distinguish them. Mean Time to Repair focuses on the actual fix duration, while Mean Time to Recovery includes the full cycle from failure detection to service restoration.
Availability = MTBF / (MTBF + MTTR). Reducing MTTR directly improves availability. If MTBF is 1000 hours and MTTR drops from 2 hours to 1 hour, availability improves from 99.8% to 99.9%.
Median (p50) is more robust against outliers, but tracking both is valuable. Also track p90 and p95 repair times to understand worst-case scenarios and ensure consistently fast response rather than just average performance.