OSHA uses the DART rate (with the TRIR) to compare safety performance. BLS publishes industry averages – for private industry the DART rate is about 1.5.
How to use the DART Rate Calculator
- Number of DART cases
- Total hours worked
- Number of employees (optional)
Results update as you type, and every field accepts the units shown in its menu.
How it works
Enter the number of DART cases and the total hours worked by all employees in the year.
Tips
- Enter figures for the same period and in the same currency.
- Exchange rates and prices change constantly – update them before you rely on a result.
- Use results as estimates and confirm important figures with the official source.
- Everything runs in your browser – try different values to compare scenarios.
Common mistakes to avoid
- Mixing gross and net figures.
- Using outdated rates.
- Treating rules of thumb as exact.
Inputs explained
| Field | What to enter |
|---|---|
| Number of DART cases | A number |
| Total hours worked | A number |
| Number of employees (optional) | A number |
Example values
How the main result changes when Number of DART cases changes and everything else stays at the example values above:
| Number of DART cases | DART rate |
|---|---|
| 2 | 1 |
| 3 | 1.5 |
| 4 | 2 |
| 5 | 2.5 |
| 6 | 3 |
| 8 | 4 |
Formula
DART rate = (number of DART cases × 200,000) ÷ total hours worked200,000 = 100 full-time employees × 40 hours × 50 weeksWorked example
Inputs — Number of DART cases: 4; Total hours worked: 400,000; Number of employees (optional): 200.
Results — DART rate = 2; Cases per 100 employees (by headcount) = 2.
Frequently asked questions
What is the DART rate?
Cases with days away, restricted duty or transfer per 100 full-time workers.
Why 200,000 hours?
It's the hours of 100 employees working 40 hours a week for 50 weeks.
What is a good DART rate?
Lower than your industry average published by BLS.
What formula does the DART Rate Calculator use?
DART rate = (number of DART cases × 200,000) ÷ total hours worked.