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Total Recordable Incident Rate per 200,000 Hours

Calculate a recordable injury-and-illness incidence rate from a whole case count and total employee hours worked.

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How to use this calculator

  1. Enter the known values in the units shown. Results update as you type.
  2. Where results are editable, change one to solve backwards. Lock a value to hold it fixed.
  3. Use the worked example to check the method. Reset restores the starting fields.

Use the result with context

Results are estimates for planning and education. Confirm rates, taxes, fees, and legal requirements with the relevant institution or a qualified professional before making a financial decision.

Formula and method

Three recordable injury and illness cases over 200,000 employee-hours give a total recordable incident rate of 3.

TRIR = recordable injury and illness cases × 200,000 ÷ employee hours worked

Worked example

Enter these known values and leave the other values blank.

Total employee hours worked
200000 hrs
Recordable injury and illness cases
3
Cases per 200,000 employee-hours
3

Assumptions and limitations

  • Recordable injury and illness cases are a nonnegative whole number. Employee hours worked are positive and cover the same population and reporting period.
  • Use cases meeting the applicable recordkeeping definition, not days lost, all first-aid incidents or only injuries while omitting recordable illnesses.
  • The factor 200,000 represents 100 full-time-equivalent workers at 40 hours a week for 50 weeks. It normalizes the rate rather than estimating an actual workforce size.
  • A low or zero rate alone does not establish that a workplace is safe. Small populations can produce volatile rates.

Common questions

Does this count days away from work?

No. The numerator is recordable cases. A rate based specifically on days-away, restriction or transfer cases uses that particular case count instead.

Can I enter zero cases?

Yes. With positive employee hours, zero cases give a zero incident rate.

References

Bookify requires a whole recordable-case count and treats the displayed source intervals as numerical ranges, not safety ratings.

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