# TRIR Calculator – Total Recordable Incident Rate

URL: https://speedycalculator.com/calculators/finance/trir/
Last updated: 2026-10-25

> The TRIR calculator works out the OSHA total recordable incident rate – recordable injuries and illnesses per 100 full-time workers per year – from the number of recordable cases and total hours worked, along with the DART and lost time rates.

## Inputs

- Number of OSHA recordable cases
- DART cases
- Lost-time cases
- Total hours worked

## Results

- Total recordable incident rate (TRIR)
- DART rate
- Lost time incident rate

## Formula

```
TRIR = recordable cases × 200,000 ÷ total hours worked
DART = DART cases × 200,000 ÷ hours
LTIR = lost-time cases × 200,000 ÷ hours
```

## Explanation

The BLS reported a private-industry TRIR of about 2.4 for recent years; construction and manufacturing run higher. Many clients require contractors to have a TRIR below a set threshold.

### How to use the TRIR Calculator – Total Recordable Incident Rate

- **Number of OSHA recordable cases**
- **DART cases**
- **Lost-time cases**
- **Total hours worked**

Results update as you type, and every field accepts the units shown in its menu.

### How it works

Enter recordable cases, DART cases, lost-time cases and total hours worked.

### 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- Using outdated rates.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

FieldWhat to enterNumber of OSHA recordable casesA numberDART casesA numberLost-time casesA numberTotal hours workedA number

### What each result means

- **Total recordable incident rate (TRIR)** = [Number of OSHA recordable cases]×200000÷[Total hours worked]
- **DART rate** = [DART cases]×200000÷[Total hours worked]
- **Lost time incident rate** = [Lost-time cases]×200000÷[Total hours worked]

### Example values

How the main result changes when **Number of OSHA recordable cases** changes and everything else stays at the example values above:

Number of OSHA recordable casesTotal recordable incident rate (TRIR)31.254.51.8862.57.53.1393.75125

## Worked example

Inputs — Number of OSHA recordable cases: 6; DART cases: 3; Lost-time cases: 2; Total hours worked: 480,000.

Results — **Total recordable incident rate (TRIR) = 2.5**; DART rate = 1.25; Lost time incident rate = 0.83.

## FAQ

**What is TRIR?**
Recordable incidents per 100 full-time workers per year.

**What is a good TRIR?**
Below your industry's BLS average; under 1 is excellent in most industries.

**What counts as a recordable incident?**
Work-related injuries needing more than first aid, days away, restricted work or loss of consciousness.

**What formula does the TRIR Calculator – Total Recordable Incident Rate use?**
TRIR = recordable cases × 200,000 ÷ total hours worked.


## Sources

- [OSHA – Recordkeeping](https://www.osha.gov/recordkeeping)