Compute the OSHA Days Away, Restricted or Transferred rate.
Please do not make financial decisions based on these results.
What is the DART Rate Calculator?
Compute the OSHA Days Away, Restricted or Transferred rate. To use the DART Rate Calculator, enter dart cases, total hours worked; it returns dart rate, equivalent full-time workers, and shows them instantly as you type.
Where the DART Rate Calculator fits
Compute the OSHA Days Away, Restricted or Transferred rate. The main figure it returns is the DART rate, worked out from the values you enter.
It belongs with the other hr & workforce tools. If you are comparing options or checking a result from another angle, try the Bill Rate Calculator, TRIR Calculator or the Attrition Rate Calculator.
How to use the DART Rate Calculator
- Fill in the fields. You will need DART cases, Total hours worked. Use real figures from your own records where you can. Fields marked optional can stay at zero.
- Read the result. The highlighted box gives the DART rate, and the cards below show Equivalent full-time workers. Tables and charts break it down further.
- Test other scenarios. Results update as you type. Change one value at a time to see what drives the answer, and press Reset to go back to the defaults.
Formula and how it works
Example with real numbers
Here is the DART Rate Calculator using the default values shown in the calculator above:
Inputs
| DART cases | 3 |
|---|---|
| Total hours worked | 420,000 |
Results
| DART rate | 1.43 |
|---|---|
| Equivalent full-time workers | 210 |
With these inputs the calculator returns DART rate: 1.43. Change any value in the calculator to see how the result moves.
What if you change one input?
Sensitivity check: raising DART cases from 3 to 3.6 (about 20% higher) and leaving everything else as in the example above changes the results like this:
| Result | Example | After the change | Change |
|---|---|---|---|
| DART rate | 1.43 | 1.71 | +20% |
| Equivalent full-time workers | 210 | 210 | 0% |
The input that moves the result most is the one to check twice. Change it in the calculator above to test your own case.
What the results tell you
The results panel of the DART Rate Calculator reports DART rate and equivalent full-time workers. Compare these figures while changing one input at a time, and use the related calculators below to look at the same situation from another angle.
Method and limits. This calculator applies the formula in the section above to your inputs, in your browser; nothing you enter is stored on our servers. The result is only as accurate as the numbers you enter and the formula shown above. It is for information, not financial, tax or legal advice.
Frequently asked questions
What hours base does OSHA use?
200,000 hours, about 100 full-time workers for one year.
Which period should I measure over?
Use the same period (month, quarter or year) for every input so the ratios stay comparable.
How do I calculate turnover rate?
Divide the number of leavers by the average headcount for the period and multiply by 100.
Are the results guaranteed?
No. Results depend entirely on the numbers you enter and the formulas shown on this page. Please do not make financial decisions based on them alone; confirm important figures with a licensed professional.
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