How do you calculate the OSHA 300 log rate?

Multiply the number of recordable cases by 200,000, then divide by total hours worked. With 6 cases and 500,000 hours, the rate is 6 x 200,000 / 500,000 = 2.4 recordable cases per 100 full-time workers.

Where does the 200,000 come from?

It represents 100 full-time-equivalent workers each working 2,000 hours a year (100 x 2,000). Using it as the multiplier normalizes any company's rate to a 'per 100 workers per year' basis so different-sized employers can be compared directly.

What is a good OSHA 300 incident rate?

It depends on your industry — compare against the BLS TCIR for your NAICS code. Broadly, a total recordable rate near or below the BLS national average (often around 2.5-3.5 for manufacturing) is competitive, so the 2.4 in the example would be favorable for most manufacturing sectors.

Is the OSHA 300 log rate the same as TCIR?

Yes — when you count all recordable cases, this formula produces the Total Case Incident Rate (TCIR, also called TRIR). Use only the cases involving days away, restriction, or transfer and the same formula gives the DART rate instead.

What counts as a recordable case?

A work-related injury or illness that results in death, days away from work, restricted work or job transfer, medical treatment beyond first aid, or loss of consciousness, per OSHA 1904. Simple first-aid-only cases are not recordable and should not be logged on the 300.

How do I get total hours worked?

Pull actual hours worked from payroll for all employees over the period — do not use scheduled hours, and exclude vacation, holiday, and sick leave since those are not hours worked. Overtime counts. In the example, 500,000 hours equals about 250 full-time equivalents.

Safety & Workforce calculator

OSHA 300 Log Rate Calculator

The OSHA 300 log rate is the standardized incident rate that lets a plant of any size compare its recordable injuries against industry benchmarks by normalizing to 100 full-time workers. EHS managers, plant leaders, and insurers use it to complete OSHA Form 300A, benchmark against BLS industry averages by NAICS code, and track whether a safety program is actually working year over year. It matters because raw case counts mislead — six recordables at a 50-person shop is a very different story than six at a 500-person plant, and this rate makes that comparison fair. It is the same math behind the Total Case Incident Rate (TCIR) and DART rate that auditors and customers ask for.

What this calculator does

Calculate OSHA 300 log rate for Safety & Workforce from logged cases and total hours worked, using the OSHA 200,000-hour basis.
Use it to benchmark safety performance for Safety & Workforce against OSHA and industry averages.
It computes the OSHA incident rate as recordable cases multiplied by 200,000 and divided by total employee hours worked, expressed per 100 full-time-equivalent workers.

Formula used

OSHA 300 log rate = logged cases × 200,000 ÷ total hours worked
200,000 = 100 full-time workers × 2,000 hours per year

Inputs explained

Recordable cases on the OSHA 300 log:
Total employee hours worked:

How to use the result

Use it when preparing the annual OSHA 300A summary, benchmarking against BLS or customer safety requirements, or tracking a rolling injury trend across sites or years.
The rate depends entirely on correct recordability decisions and complete hours — undercounting hours or misclassifying a first-aid case as recordable (or vice versa) skews it, and small-headcount sites swing wildly from a single case.

Current U.S. benchmarks

Manufacturing hourly earnings average $30.27 (BLS, Jun 2026), up 4.4% from a year earlier. Median machinist pay is $28.24/hr (OEWS 2025), with state medians on each state page. Manufacturers have 529k open positions nationally (BLS JOLTS).

Common questions

How do you calculate the OSHA 300 log rate? Multiply the number of recordable cases by 200,000, then divide by total hours worked. With 6 cases and 500,000 hours, the rate is 6 x 200,000 / 500,000 = 2.4 recordable cases per 100 full-time workers.
Where does the 200,000 come from? It represents 100 full-time-equivalent workers each working 2,000 hours a year (100 x 2,000). Using it as the multiplier normalizes any company's rate to a 'per 100 workers per year' basis so different-sized employers can be compared directly.
What is a good OSHA 300 incident rate? It depends on your industry — compare against the BLS TCIR for your NAICS code. Broadly, a total recordable rate near or below the BLS national average (often around 2.5-3.5 for manufacturing) is competitive, so the 2.4 in the example would be favorable for most manufacturing sectors.
Is the OSHA 300 log rate the same as TCIR? Yes — when you count all recordable cases, this formula produces the Total Case Incident Rate (TCIR, also called TRIR). Use only the cases involving days away, restriction, or transfer and the same formula gives the DART rate instead.
What counts as a recordable case? A work-related injury or illness that results in death, days away from work, restricted work or job transfer, medical treatment beyond first aid, or loss of consciousness, per OSHA 1904. Simple first-aid-only cases are not recordable and should not be logged on the 300.

Last reviewed 2026-05-12.