About TRIR Calc
Who builds TRIR Calc, what the calculators are for, how the site is funded, and why every rule on it comes from OSHA's own text.
Updated
TRIR Calc is run by Paul Gunder through Rocky Mountain Apps, where he builds calculators and reference tools. It's an independent site, not affiliated with OSHA or the U.S. Department of Labor, and nothing on it is an official reading of the rules.
Why it exists
Two parts of injury recordkeeping catch people out. One is the rate arithmetic: which cases go on top, which hours go underneath, and why the 200,000 is there at all. The other is where first aid ends and medical treatment begins, because that line decides whether a case reaches the log. Answers to both are easy to find, but few of them show where they came from. Here, each page names the paragraph or form it relies on and links to it, so you can read the rule for yourself.
How it's paid for
The calculators are free. A paid spreadsheet, an OSHA 300 log with its summary, may be offered on the site, and ads may appear later.
Your numbers
The calculations happen in your browser, and what you type isn't sent to TRIR Calc or anyone else. Each tool does keep its inputs in the page address, though, so anyone who opens a link you share sees the figures you entered.
Reporting an error
If a result or a sentence here looks wrong, email the address on the contact page. Say which page, what you entered and, if you can, which rule or form disagrees with it. Corrections are listed on What changed.