TRIR (Total Recordable Incident Rate) Calculator
ANA›Life Services Authority›National Calculator Authority›TRIR (Total Recordable Incident Rate) 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; } }
TRIR (Total Recordable Incident Rate) Calculator
Calculate your organization's Total Recordable Incident Rate (TRIR) using OSHA's standard formula. TRIR measures the number of recordable workplace incidents per 100 full-time employees per year.
Number of Recordable Incidents
Total OSHA recordable incidents in the period (injuries + illnesses)
Total Hours Worked by All Employees
Sum of all hours worked by every employee during the period
Constant (OSHA Standard)
200,000 — 100 full-time employees × 2,000 hrs/yr (standard) 1,000,000 — per 500 full-time employees (alternative)
OSHA uses 200,000 hours as the standard base for 100 FTE workers
Calculate TRIR
TRIR: —
function triValidate() { const incidents = document.getElementById('tri-incidents').value; const hours = document.getElementById('tri-hours').value; const errEl = document.getElementById('tri-error'); errEl.style.display = 'none'; errEl.textContent = '';
if (incidents !== '' && (isNaN(incidents) || Number(incidents) ' + ' • Recordable Incidents (N): ' + N + '' + ' • Total Hours Worked (H): ' + H.toLocaleString() + '' + ' • OSHA Constant: ' + constant.toLocaleString() + '' + ' • Equivalent FTE Workers: ' + fteEquiv.toFixed(1) + '' + ' • TRIR = (' + N + ' × ' + constant.toLocaleString() + ') / ' + H.toLocaleString() + ' = ' + trir.toFixed(4) + '';
const ratingEl = document.getElementById('tri-rating'); ratingEl.innerHTML = '' + rating.label + '';
resultEl.style.display = 'block'; }
.rating-excellent { color: #1a7f37; font-weight: 700; } .rating-good { color: #2d8a4e; font-weight: 700; } .rating-average { color: #b08000; font-weight: 700; } .rating-below { color: #c05000; font-weight: 700; } .rating-poor { color: #c0392b; font-weight: 700; } .calc-result-breakdown { margin-top: 12px; font-size: 0.95rem; line-height: 1.8; } .calc-result-rating { margin-top: 10px; font-size: 1rem; }
#### Formula
TRIR = (N × 200,000) / H
- N — Number of OSHA recordable incidents (injuries and illnesses) in the measurement period
- 200,000 — OSHA constant representing 100 full-time employees working 2,000 hours per year (100 employees × 50 weeks × 40 hrs/week)
- H — Total hours worked by all employees during the measurement period
The result expresses the incident rate per 100 full-time equivalent workers, enabling fair comparison across organizations of different sizes.
#### Assumptions & References
- Recordable incidents are defined by OSHA 29 CFR 1904 and include work-related fatalities, injuries, and illnesses that result in days away from work, restricted work, job transfer, medical treatment beyond first aid, loss of consciousness, or diagnosis by a healthcare professional.
- Hours worked should include overtime but exclude vacation, sick leave, and other non-worked hours.
- A national all-industry average TRIR of approximately 2.7–3.0 is commonly cited (BLS Survey of Occupational Injuries and Illnesses).
- Reference: OSHA Recordkeeping Rule — 29 CFR Part 1904; BLS Occupational Injuries and Illnesses Survey.
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