DART Rate Calculator

The formula to calculate a DART rate is:

Number of DART cases in financial year / Hours worked in financial year x 200,000

Example:

In 2022, a manufacturing company experienced 8 DART cases. The company has a workforce of 500 employees. During 2022, total hours worked by all employees was 1,000,000 hours.

To calculate the company's DART rate:

• Number of DART cases: 8
• Total hours worked (for all company employees) during the year: 1,000,000 hours

Use the Formula:

$\text{DART Rate} = \left( \frac{\text{Number of DART cases}}{\text{Total hours worked}} \right) \times 200,000$

$\text{DART Rate} = \left( \frac{8}{1,000,000} \right) \times 200,000 = 1.6$

So, the DART rate for the manufacturing company in 2022 is 1.6. If we were to compare it to an industry standard, let's say the average manufacturing industry rate is 3.0, then the company's DART rate of 1.6 is below the industry average.

In summary:

• Number of DART cases during the year: 8
• Hours worked during the year: 1,000,000
• DART Rate = 1.6

Worked example: 3 DART cases in 250,000 hours

1. Count your DART cases for the year. On the OSHA Form 300 log, that's every case marked in column H (days away from work) or column I (job transfer or restriction). In this example, there are 3.
2. Add up the total hours actually worked by all employees in the same year, including overtime. Leave out paid leave such as holidays and sick days. In this example, that's 250,000 hours.
3. Divide the cases by the hours: 3 ÷ 250,000 = 0.000012.
4. Multiply by 200,000: 0.000012 × 200,000 = 2.4.

The DART rate is 2.4. That means 2.4 DART cases for every 100 full-time workers over a year.

What is DART rate?

DART rate (Days Away, Restricted, or Transferred rate) is an OSHA recordkeeping measure. It shows how many work-related injuries and illnesses led to days away from work, restricted duties or a job transfer for every 100 full-time workers in a year. The 200,000 in the formula equals 100 workers doing 40 hours a week for 50 weeks.

What is included in DART cases?

DART cases include incidents that result in days away from work, restricted work activity, or job transfer due to work-related injuries or illnesses.

How is DART different from TRIR?

DART is a subset of TRIR. While TRIR includes all recordable incidents, DART only includes the more severe cases that result in time away, restrictions, or transfers.

What is a good DART rate?

There's no single number. A good DART rate is one below the average for your industry, and lower is better. The US Bureau of Labor Statistics (BLS) publishes average DART rates by industry each year, using NAICS codes, in its Survey of Occupational Injuries and Illnesses. Find your NAICS code and compare your rate with the latest year's figure.

• DART rates are intended as a guide only and should be interpreted carefully.
• DART rates are not recommended for small businesses, where changes to the number of incidents are likely to result in a DART rate that is much larger or smaller than expected.