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TRIR Calculator & Safety KPI Suite
Calculate TRIR, DART rate, frequency rate, severity rate, and injury costs in seconds. Benchmark your numbers against BLS industry averages. All computation runs in your browser — nothing is sent to any server.
TRIR Calculator
Calculate your Total Recordable Incident Rate per OSHA standards. Benchmark against BLS industry averages.
DART Rate Calculator
Compute Days Away, Restricted, or Transferred rate — the severity metric OSHA uses for enforcement targeting.
Frequency Rate (LTIFR)
Lost Time Injury Frequency Rate per ILO / ISO 45001 methodology — LTIs per million man-hours.
Severity Rate
Measure lost days per million man-hours to complement frequency data with injury severity impact.
Injury Cost Estimator
Estimate true cost of injuries including direct, indirect (NSC 2.7× multiplier), and revenue impact.
Total Recordable Incident Rate (TRIR)
TRIR measures workplace injuries per 200,000 hours worked (approximately 100 full-time employees for one year). Also known as Total Recordable Injury Rate or OSHA Incident Rate.
TRIR = (Recordable Incidents × 200,000) ÷ Total Hours Worked
Injuries requiring medical treatment beyond first aid, days away from work, restricted duty, or job transfer.
Sum of all employee hours worked in the period. Exclude vacation, sick leave, and holidays.
Understanding Safety KPIs
What these numbers actually tell you. And what they don't.
Lagging Indicator
TRIR counts what already happened
TRIR is a lagging metric — it tells you about past incidents. A low TRIR doesn't guarantee future safety. Pair it with leading indicators like near-miss reports, hazard observations, and training completion rates.
Severity Matters
DART captures the injuries that hurt most
Two companies can have the same TRIR but very different DART rates. A high DART relative to TRIR means your injuries are disproportionately severe — focus on the specific hazards causing lost time.
The Real Cost
Indirect costs are 2.7× direct costs
The NSC estimates that for every dollar of workers' comp, companies spend $2.70 more on investigation, retraining, overtime, production delays, and morale impact. Most EHS teams dramatically underestimate true cost.
International Standard
Frequency Rate ≠ TRIR
TRIR uses a 200,000-hour base (OSHA standard). Frequency Rate uses 1,000,000 hours (ILO/ISO). Don't compare them directly. Use TRIR for US reporting, FR for international or ISO 45001 compliance.
Leading > Lagging
The best safety metric is one that predicts
SAFVR's AURA engine combines TRIR, near-miss data, hazard density, and behavioral signals into a predictive risk score — shifting from 'what happened' to 'what's likely to happen next.'
Small Denominators
Low hours = noisy TRIR
If your total hours worked is low (small workforce or short period), a single incident can spike your TRIR dramatically. Consider using rolling 12-month calculations for more stable trending.
BLS Industry TRIR & DART Benchmarks (2022)
Source: Bureau of Labor Statistics, Survey of Occupational Injuries and Illnesses (SOII), 2022 full-year data.
| Industry | TRIR | DART | Source |
|---|---|---|---|
| All Industries | 2.7 | 1.5 | BLS 2022 |
| Manufacturing | 3.3 | 1.7 | BLS 2022 |
| Construction | 2.8 | 1.6 | BLS 2022 |
| Warehousing & Storage | 5.5 | 3.3 | BLS 2022 |
| Mining | 1.5 | 0.9 | BLS 2022 |
| Oil & Gas Extraction | 0.8 | 0.5 | BLS 2022 |
| Transportation | 4.2 | 2.5 | BLS 2022 |
| Automotive Mfg | 4.6 | 2.2 | BLS 2022 |
| Food Manufacturing | 4.2 | 2.1 | BLS 2022 |
| Chemical Mfg | 2.0 | 1.0 | BLS 2022 |
How to Calculate TRIR — Step by Step
- Count OSHA recordable incidents — injuries or illnesses requiring medical treatment beyond first aid, days away from work, restricted duty, or job transfer.
- Sum total hours worked — all employees, all hours. Exclude vacation, sick leave, and holidays. For a quick estimate: employees × 2,000 hours/year.
- Apply the formula — TRIR = (Recordable Incidents × 200,000) ÷ Total Hours Worked. The 200,000 factor normalizes to 100 full-time workers for one year.
- Benchmark your result — compare against your industry's BLS average. A TRIR below your sector average is generally considered good; below 1.0 is world-class.
Beyond the spreadsheet
Track these KPIs automatically. Reduce TRIR before the next OSHA log.
SAFVR detects hazards in real time on your existing CCTV, triggers corrective actions, and auto-logs every event — feeding your TRIR, DART, and severity metrics continuously.
Frequently Asked Questions
Safety KPI answers you can cite.
What is TRIR and how is it calculated?
TRIR (Total Recordable Incident Rate) measures workplace injuries per 200,000 hours worked — approximately 100 full-time employees for one year. Formula: TRIR = (Recordable Incidents × 200,000) ÷ Total Hours Worked. A lower TRIR indicates better safety performance. The BLS all-industry average is 2.7 (2022).
What is the DART rate?
DART (Days Away, Restricted, or Transferred) rate measures the most severe workplace injuries — those resulting in days away from work, restricted duty, or job transfer. Formula: DART = (DART Cases × 200,000) ÷ Total Hours Worked. OSHA uses DART rates for enforcement targeting.
What is the difference between TRIR and DART?
TRIR includes all OSHA recordable incidents, while DART only counts the most severe cases (those involving days away, restricted work, or job transfer). DART is always less than or equal to TRIR. Both use the 200,000-hour base.
What is a good TRIR rate?
A good TRIR varies by industry. The BLS all-industry average is 2.7. Manufacturing averages 3.3, construction 2.8, and warehousing 5.5. A TRIR below your industry average is generally considered good. World-class safety programs target a TRIR below 1.0.
What does 200,000 represent in the TRIR formula?
The 200,000 factor represents approximately 100 full-time employees working 40 hours per week for 50 weeks (100 × 40 × 50 = 200,000). This standardization allows fair comparison between companies and industries of different sizes.
How much does a workplace injury cost?
According to the NSC and Liberty Mutual, the average direct cost of a workplace injury is approximately $42,000. However, indirect costs (investigation, retraining, productivity loss, OSHA penalties) add 2.7× more — making the true cost around $155,000 per incident.
What is a Lost Time Injury Frequency Rate (LTIFR)?
LTIFR measures lost time injuries per million man-hours worked. It's the international standard (ILO, ISO 45001) equivalent of OSHA's TRIR. Formula: LTIFR = (Lost Time Injuries × 1,000,000) ÷ Total Hours Worked.
Can SAFVR help reduce my TRIR?
Yes. SAFVR's AURA engine detects hazards in real time on your existing CCTV, triggers corrective actions before incidents occur, and auto-logs every observation — feeding your TRIR, DART, and near-miss metrics continuously. Pilot customers have seen 40–60% reductions in recordable incidents within the first quarter.