Mean Time To Resolution (MTTR) Calculator
ANA›Life Services Authority›National Calculator Authority›Mean Time To Resolution (MTTR) Calculator
.calc-container { max-width: 640px; margin: 2rem 0; padding: 1.5rem; background: #fff; border: 1px solid #ddd; border-radius: 8px; box-shadow: 0 1px 3px rgba(0,0,0,0.06); font-family: system-ui, -apple-system, sans-serif; } .calc-container h3 { font-family: Georgia, serif; font-size: 1.15rem; color: #1a1a1a; margin-bottom: 1rem; padding-bottom: 0.5rem; border-bottom: 2px solid var(--ac, #3d5a80); } .calc-row { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 0.75rem; flex-wrap: wrap; } .calc-row label { min-width: 160px; font-size: 0.9rem; color: #333; font-weight: 500; } .calc-row input[type="number"], .calc-row select { flex: 1; min-width: 120px; max-width: 200px; padding: 0.5rem 0.6rem; border: 1px solid #ccc; border-radius: 4px; font-size: 0.9rem; font-family: system-ui, sans-serif; color: #1a1a1a; background: #fafaf8; } .calc-row input:focus, .calc-row select:focus { outline: none; border-color: var(--ac, #3d5a80); box-shadow: 0 0 0 2px rgba(26,74,138,0.12); } .calc-row .unit { font-size: 0.82rem; color: #888; min-width: 30px; } .calc-btn { display: inline-block; margin-top: 0.5rem; padding: 0.55rem 1.5rem; background: var(--ac, #3d5a80); color: #fff; border: none; border-radius: 4px; font-size: 0.9rem; font-weight: 600; cursor: pointer; font-family: system-ui, sans-serif; } .calc-btn:hover { opacity: 0.9; } .calc-result { margin-top: 1.25rem; padding: 1rem 1.25rem; background: #f0f6fc; border-left: 3px solid var(--ac, #3d5a80); border-radius: 0 6px 6px 0; display: none; } .calc-result.visible { display: block; } .calc-result-label { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.06em; color: #666; margin-bottom: 0.25rem; } .calc-result-value { font-size: 1.6rem; font-weight: 700; color: var(--ac, #3d5a80); } .calc-result-detail { font-size: 0.85rem; color: #555; margin-top: 0.5rem; line-height: 1.5; } .calc-note { margin-top: 1rem; font-size: 0.8rem; color: #888; font-style: italic; } .calc-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; margin-top: 0.75rem; } .calc-grid-item { padding: 0.6rem 0.8rem; background: #f8f9fa; border-radius: 4px; border: 1px solid #eee; } .calc-grid-item .label { font-size: 0.75rem; color: #888; text-transform: uppercase; letter-spacing: 0.04em; } .calc-grid-item .value { font-size: 1.1rem; font-weight: 600; color: #1a1a1a; } @media (max-width: 720px) { .calc-row { flex-direction: column; align-items: flex-start; gap: 0.3rem; } .calc-row label { min-width: auto; } .calc-row input[type="number"], .calc-row select { max-width: 100%; width: 100%; } .calc-grid { grid-template-columns: 1fr; } } .calc-chart { margin: 1rem 0; text-align: center; } .calc-chart svg { max-width: 100%; height: auto; } .calc-chart-legend { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.6rem 1.2rem; margin-top: 0.6rem; font-size: 0.8rem; color: #555; } .calc-chart-legend span { display: inline-flex; align-items: center; gap: 0.3rem; } .calc-chart-legend i { display: inline-block; width: 10px; height: 10px; border-radius: 2px; font-style: normal; } .calc-related { max-width: 640px; margin: 2rem 0 1rem; padding: 1.25rem 1.5rem; background: #f8f9fa; border: 1px solid #e8e8e8; border-radius: 8px; } .calc-related h3 { font-family: Georgia, serif; font-size: 1rem; color: #1a1a1a; margin: 0 0 0.75rem; padding-bottom: 0.4rem; border-bottom: 2px solid var(--ac, #3d5a80); } .calc-related-list { list-style: none; padding: 0; margin: 0 0 0.75rem; display: grid; grid-template-columns: 1fr 1fr; gap: 0.4rem 1.5rem; } .calc-related-list li a { font-size: 0.88rem; color: var(--ac, #3d5a80); text-decoration: none; } .calc-related-list li a:hover { text-decoration: underline; } .calc-browse-all { margin: 0.5rem 0 0; font-size: 0.9rem; font-weight: 600; } .calc-browse-all a { color: var(--ac, #3d5a80); text-decoration: none; } .calc-browse-all a:hover { text-decoration: underline; } @media (max-width: 720px) { .calc-related-list { grid-template-columns: 1fr; } }
Mean Time To Resolution (MTTR) Calculator
Calculate the average time taken to fully resolve failures, incidents, or support tickets from the moment they are reported until they are completely resolved.
Calculation Mode
Total Downtime & Incident Count Individual Incident Durations
Total Resolution Time
Resolution Time Unit
Minutes Hours Days
Number of Incidents
Individual Incident Durations (minutes)
✕
✕
✕
- Add Incident
Display Result In
Minutes Hours Days
Calculate MTTR —
function meaToggleMode() { var mode = document.getElementById('mea-mode').value; document.getElementById('mea-aggregate-section').style.display = (mode === 'aggregate') ? '' : 'none'; document.getElementById('mea-individual-section').style.display = (mode === 'individual') ? '' : 'none'; document.getElementById('mea-result').textContent = '—'; document.getElementById('mea-breakdown').style.display = 'none'; }
function meaAddRow() { var list = document.getElementById('mea-incidents-list'); var row = document.createElement('div'); row.className = 'mea-incident-row'; row.style.cssText = 'display:flex;gap:8px;margin-bottom:6px;'; row.innerHTML = '' + '✕'; list.appendChild(row); }
function meaRemoveRow(btn) { var rows = document.querySelectorAll('.mea-incident-row'); if (rows.length ' + '• Total Resolution Time: ' + totalMinutes.toFixed(2) + ' min' + ' (' + totalHours + ' hrs / ' + totalDays + ' days)' + '• Number of Incidents: ' + incidentCount + '' + '• MTTR: ' + totalMinutes.toFixed(2) + ' ÷ ' + incidentCount + ' = ' + mttrMinutes.toFixed(4) + ' minutes' + '• MTTR: ' + (mttrMinutes / 60).toFixed(4) + ' hours' + '• MTTR: ' + (mttrMinutes / 1440).toFixed(4) + ' days';
// Benchmark context var benchmark = ''; if (mttrMinutes ' + benchmark; breakdownEl.style.display = 'block'; }
#### Formula
MTTR = Total Resolution Time / Number of Incidents
Where:
- Total Resolution Time — The sum of all time intervals from when each incident was reported to when it was fully resolved.
- Number of Incidents — The total count of incidents in the measurement period.
Example: If 3 incidents took 45, 90, and 30 minutes to resolve: MTTR = (45 + 90 + 30) / 3 = 55 minutes
#### Assumptions & References
- Resolution time is measured from the moment an incident is reported or detected to the moment it is fully resolved (not just mitigated).
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