How to Calculate Your OSHA DART Rate: A Guide to Workplace Safety Metrics

In any business, ensuring the safety and well-being of your team is paramount. Beyond simply protecting your employees, a strong safety record can lead to increased productivity, higher morale, and reduced operational costs. When it comes to workplace injuries and OSHA compliance, understanding key safety performance metrics is crucial. This guide will walk you through the OSHA DART (Days Away, Restricted, or Transferred) rate, explaining what it means, why it matters for your business, and how to accurately calculate it to better protect your team and maintain compliance.

Quick Answer:

The DART rate (Days Away, Restricted, or Transferred) measures the number of serious workplace injuries or illnesses per 100 full-time employees. It’s calculated using the formula: (Total # of recordable incidents x 200,000) / Total employee hours worked = DART rate

Whether you operate a small machine shop or manage a construction crew, your DART safety rate gives you insight into the health of your workplace. A lower rate usually means fewer serious incidents, while a higher one might suggest areas where safety improvements are needed.

Use the OSHA injury rate formula:

DART Rate = (Total # of recordable incidents x 200,000) / Total employee hours worked

Here’s how each part of the formula breaks down:

• Number of DART incidents includes all OSHA-recordable incidents that result in days away from work, restricted job duties, or transfers to another position due to a work-related injury or illness. You'll find these recorded in your OSHA 300 Log.
• 200,000 represents the total hours 100 full-time employees would work in a year (based on 40 hours per week for 50 weeks)
• Total employee hours worked is the actual number of hours your workforce logged during the year.

While the DART rate is a crucial indicator, it's just one of several key performance indicators that OSHA tracks to assess workplace safety. To gain a comprehensive understanding of your safety landscape, consider monitoring these other important metrics.

• Total Recordable Incident Rate (TRIR): This metric captures all OSHA-recordable incidents, including those that don't result in days away, restricted duty, or transfer.
• Lost Time Incident Rate (LTIR): This measures incidents specifically resulting in time away from work, focusing on the most severe outcomes.
• Severity Rate: This reflects the seriousness of injuries based on the number of days employees are away from their jobs, providing insight into the impact of incidents.

Each of these metrics offers a different angle on workplace safety. When you monitor them together, not just the DART rate, you gain a more complete picture of how well your safety programs are working and where there’s room for improvement.

Understanding what DART rate is and how to calculate it is essential for any business that values safety, compliance, and team well-being. It’s not just about numbers. It’s about using those numbers to identify risks, reduce injuries, and improve conditions for the people who keep your business running. You don’t need to be a safety expert to understand this metric. With the DART rate definition and formula in hand, you’ve got the tools to track safety performance with confidence. 

Support a safer, more productive work environment with the right supplies. From OSHA-compliant recordkeeping tools to PPE and training resources, Zoro makes it easy to find what your team needs to stay protected and prepared.

What is DART rate?
DART rate stands for Days Away, Restricted, or Transferred. It measures workplace injuries or illnesses that cause workers to miss work, be restricted in their duties, or be transferred to another role.

How is DART rate calculated?
DART rate is calculated by multiplying the number of DART incidents by 200,000, then dividing that result by the total number of employee hours worked in a year.

What is the formula for DART rate?
(Total # of recordable incidents x 200,000) / Total employee hours worked = DART rate

What is the meaning of DART rate in terms of safety?
In safety terms, the DART rate reflects the impact of serious, recordable incidents on a workforce. It helps employers identify trends and evaluate the effectiveness of their safety programs.

What is the difference between DART and TRIR?
While both track OSHA-recordable incidents, DART includes only those that result in days away, job restrictions, or transfers. TRIR (Total Recordable Incident Rate) includes all recordable incidents, including minor ones that don’t result in those outcomes.

Product Compliance and Suitability
The statements contained in this guide are intended for general informational purposes only. Such statements do not constitute a product recommendation or representation as to the appropriateness, accuracy, completeness, correctness, or currentness of the information provided. Information provided in this guide does not replace the use by you of any manufacturer instructions, technical product manual, or other professional resource or adviser available to you. Always read, understand, and follow all manufacturer instructions. Portions of this article were generated in part by ChatGPT, and edited by a member of the Zoro team.