Calculate Mean Time To Repair (MTTR) from incident data. Measure your team's incident response efficiency with DORA benchmarks and improvement suggestions.
You might also find these calculators useful
Calculate SRE error budgets from SLO targets for reliability engineering
Calculate error budget burn rates for SLO-based alerting
Calculate downtime costs and revenue impact
Calculate allowed downtime from SLA percentage and check compliance
Mean Time To Repair (MTTR) is one of the four key DORA metrics that measures how quickly your team can restore service after an incident. Our calculator helps you measure MTTR, compare against industry benchmarks, and identify areas for improvement in your incident management process.
MTTR measures the average time it takes to repair a system and restore normal operations after a failure. It starts from incident detection and ends when the service is fully operational again. MTTR can also mean Mean Time To Recovery, Mean Time To Respond, or Mean Time To Resolve depending on context—our calculator focuses on the repair/recovery definition used by the DORA framework.
MTTR Formula
MTTR = Total Downtime / Number of IncidentsMTTR is one of the four DORA metrics that predict software delivery performance. Elite performers achieve MTTR under 1 hour.
Many SLAs specify maximum MTTR. Track your actual performance to ensure compliance and avoid penalties.
Lower MTTR means less downtime for users. Every minute of faster recovery improves customer satisfaction.
High MTTR often indicates problems with monitoring, documentation, or team processes that can be systematically improved.
Downtime is expensive. Reducing MTTR directly reduces lost revenue, productivity, and reputation damage from outages.
Combined with MTBF, MTTR helps calculate expected availability: Availability = MTBF / (MTBF + MTTR).
Calculate MTTR at the end of each month to track trends. If MTTR is increasing, investigate whether the cause is more complex incidents, understaffed on-call, or degraded tooling. Use the trend to justify incident management improvements.
When defining SLAs with customers, use historical MTTR data to set realistic targets. If your average MTTR is 45 minutes, committing to a 15-minute MTTR SLA will likely result in violations. Use the calculator to understand what's achievable.
Compare MTTR across different on-call rotations or teams. Significant differences might indicate training needs, documentation gaps, or tooling disparities that can be addressed to improve overall incident response.
Measure MTTR before and after implementing incident management tools (PagerDuty, OpsGenie, etc.). A tool that reduces MTTR from 2 hours to 30 minutes saves 1.5 hours per incident—multiply by incident frequency to calculate time and cost savings.
MTTR (Mean Time To Repair) is the average time to fix and restore service. MTTA (Mean Time To Acknowledge) is time to first respond to an alert. MTTF (Mean Time To Failure) is average time until a non-repairable system fails. MTBF (Mean Time Between Failures) is average uptime between failures. Together, these metrics provide a complete picture of system reliability.