DART Rate Calculator — OSHA Workplace Safety Metric
Calculate your organisation's DART rate — the OSHA metric counting Days Away from work, Restricted activity, or job Transfer incidents per 100 full-time equivalent workers. Enter the number of qualifying incidents and total employee hours to get the rate and a benchmark comparison.
hours
DART incidents per 100 full-time equivalent workers per year
- 1
DART incidents × 200,000
3 × 200,000 = 600,000 - 2
DART Rate
600,000 ÷ 200,000 = 3200,000 = 100 FTE workers × 50 weeks × 40 hours; normalises any workforce size.
How does this calculator work?
DART Rate = (DART incidents × 200,000) / total hours worked, where 200,000 represents 100 FTE workers for one year. A DART case is a recordable injury resulting in days away, restricted activity, or job transfer. BLS private-industry averages are roughly 1.0–1.5; compare to the most recent BLS figure for your NAICS industry code.
Formula
How this is calculated
The DART rate normalises workplace injury frequency to a standard base of 100 full-time equivalent (FTE) employees working one year. The 200,000-hour base is derived from 100 workers × 50 weeks × 40 hours per week. Dividing qualifying incidents by actual hours worked and multiplying by 200,000 gives a rate comparable across organisations of any size or reporting period.
A DART case is any OSHA-recordable injury or illness resulting in at least one of: (1) days away from work, (2) restricted work activity (light duty), or (3) job transfer to another position. Near-misses and first-aid-only events are not counted. DART is a subset of TRIR (Total Recordable Incident Rate), which includes all OSHA recordables — a rate that requires only medical treatment beyond first aid enters TRIR but not DART.
BLS (Bureau of Labor Statistics) publishes industry-specific DART rates annually; private-sector averages in recent years have been roughly 1.0–1.5. A rate below your industry benchmark suggests strong safety performance; a rate substantially above it warrants a review of hazard controls, near-miss reporting, and return-to-work programmes. Benchmark thresholds shown here are general estimates based on BLS data — always compare to the most recent BLS figure for your specific NAICS industry code.
Frequently asked questions
A DART case is an OSHA-recordable injury or illness that results in days away from work, restricted work activity, or transfer to a different job. Incidents requiring only first aid or medical treatment but no days away or restriction are not DART cases.
TRIR (Total Recordable Incident Rate) counts all OSHA-recordable incidents, including those requiring only medical treatment beyond first aid. DART is a subset — it counts only incidents resulting in days away, restricted activity, or job transfer. DART is therefore always equal to or lower than TRIR.
BLS private-industry averages are roughly 1.0–1.5 (2022–2024 values). Manufacturing and construction run higher; finance and professional services run lower. Always compare to the BLS figure for your specific NAICS industry code, published annually in the Survey of Occupational Injuries and Illnesses.
TG we-Calculate Editorial Team. (2026). DART Rate Calculator — OSHA Workplace Safety Metric [Online calculator]. TG we-Calculate. https://we-calculate.com/calculator/dart-rate-calculator
TG we-Calculate Editorial Team. "DART Rate Calculator — OSHA Workplace Safety Metric." TG we-Calculate. 2026. https://we-calculate.com/calculator/dart-rate-calculator.
TG we-Calculate Editorial Team, "DART Rate Calculator — OSHA Workplace Safety Metric," TG we-Calculate, 2026. [Online]. Available: https://we-calculate.com/calculator/dart-rate-calculator
@misc{wecalculate_dart_rate_calculator, title = {DART Rate Calculator — OSHA Workplace Safety Metric}, author = {{TG we-Calculate Editorial Team}}, howpublished = {\url{https://we-calculate.com/calculator/dart-rate-calculator}}, year = {2026}, note = {TG we-Calculate} }
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