Total recordable incident rate scales recordable injury and illness cases to a standard hours-worked base.
Total Recordable Incident Rate (TRIR) Calculator
Form
Results
TRIR
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Table of Contents
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What is TRIR Calculator?
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How to Use This Calculator
- Enter or select Hours worked, Number of injuries.
- Check the unit beside each measurement. For a percentage or rate, use the scale and time period stated in the form.
- Choose Calculate, then compare the output with the formula and example below. If you change a value or option, calculate again to update the result.
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Formula Used
TRIR = recordable cases × 200,000/hours worked.
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Variables Explained
| Input | What it means |
|---|---|
| Hours worked | The whole-hour part of a duration, unless the form requests decimal hours. |
| Number of injuries | The number to test or transform; use the integer or real-number domain stated in the formula. |
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Worked Example
Three cases across 300,000 hours give a rate of 2.0.
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Why Use This Calculator?
Compare rates using the same reporting definitions and hours-worked basis. A higher or lower rate describes the recorded period; case details are still needed to understand what happened.
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Common Mistakes
- Use recordable cases under the applicable reporting rules rather than every reported first-aid event.
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Frequently Asked Questions
Why does the formula use 200,000 hours?
It represents 100 full-time workers working 40 hours per week for 50 weeks. The common base lets rates be compared across workplaces of different sizes.
Are cases and lost days interchangeable?
No. The formula counts qualifying cases. A single case can involve several days away, and its case count is still one.
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Sources & References
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